Art of Problem Solving's Richard Rusczyk introduces ratios. Learn more about problem solving at our website: bit.ly/ArtofPro...
Пікірлер: 435
@YAABKA16 жыл бұрын
the ratio of kids to adult at a party 5:2 ( It's really simple this is what you do ) Add together the ratio ( 5+2=7) Than the answer which is 7 multiply by the ratio example (7*5=35) and also ( 7*2=14) there are 35 kids and 14 adults
@z84charmz5 жыл бұрын
That is just the easy part smh
@7Logik5 жыл бұрын
Wow
@emmanuelvillanueva17665 жыл бұрын
So the answer is: 5+2=7 7×5=35 7×2=14
@miagym31545 жыл бұрын
Omg thank you so much, much simpler👍😂
@AliHussain-uh9xt5 жыл бұрын
My man just made me remember that working out that my techer told me thx
@jaironeduque82413 жыл бұрын
2021 still watching from 9 years before this video
@jaironeduque82413 жыл бұрын
@coolbOy 118 eyyy
@J-dawg.3 жыл бұрын
relatable
@wut.52973 жыл бұрын
Yess
@maryamimran36183 жыл бұрын
i am with you
@constantineq6432 жыл бұрын
Join the club
@emmagracecooks68276 жыл бұрын
are you kidding!! he is the best teacher EVER!! I have watched every other video about ratios and this one actually made sense! THANK YOU
@cold63343 жыл бұрын
it does?...idk man
@user-bn8fo4py5k Жыл бұрын
I was so lost in class but I knew I had u for backup 🎉🎉😂😅
@evageorgieva35766 жыл бұрын
If you are confused... First Problem: 5+2=7 7x2=14 ( which is the number of adults) we now know that we have to multiply 7 by 5 to find the number of kids: 7x5=35 and if you are asked to write your answer as a ratio: 35:14 ----------- *Always write the ratio the way they began it in the problem: KIDS TO ADULTS. Second Problem: 5-3=2 ( to find the difference between adults and kids ) ( difference is 2 ) 3x5=15 ( to find total number ) 15-2=13 13x3= 39 (number of kids) 13x5=65 (number of adults) and if you are asked to write your answer as a ratio: 39:65 ----------- *Always write the ratio the way they began it in the problem: KIDS TO ADULTS. I hope that helped some of you. :)
@Lorna-AnneCampbell-qh4moАй бұрын
Mad how mad how this still useful twelve years later watching this in 2024
@richaka7 жыл бұрын
Dude, you are making this harder than it is. 5kids = 2adults, xkids = 14Adults. solve for x? Cross multiply, you get 2x = 70, divide both sides by 2, you get x = 35.
@zaviondenton79922 жыл бұрын
i dont understand your theory
@emmanuelukevwe1547 Жыл бұрын
Yeah. Very easy to work it out that way. This guy is really confusing and rounding . Literally got confused for this simple question 🤦♂️
@humbleobot7615 Жыл бұрын
It's not for you but for kids
@original2858 Жыл бұрын
Which 35 is correct as you suggested but kids are getting altogether which they’ll add 35 to guest and get that amount however kids are only adding the answer they get from cross multiplying instead of adding to get “altogether” teachers are now showing this way
@original2858 Жыл бұрын
I got a question; A barn is drawn 3/4 inch=4 feet. If the actual height of the barn is 59 feet, what is the height of the barn in the drawing?
@escarface10 жыл бұрын
I've watched like 6 videos and this help put the final thought process into motion. I wish all videos would explain the thought process of the last problem. This is where most of the confusion comes from
@vincentxie30905 ай бұрын
Hello, are you still active in your channel
@YAABKA16 жыл бұрын
The problem is not maths or the formula he used but communication we all don't see things the same that can make something simple very hard to understand all he was saying was 26 more people and he jumps to 13 not going in great detail I must thank him doe for putting this video up THANKS Those who wants to go into more detail the second ratio please look into this 1. 3=5 - 2 MORE ADULTS 2. 6=10 - 4 MORE ADULTS 3. 9=15 - 6 MORE ADULTS 4. 12=20 - 8 MORE ADULTS 5. 15=25 - 10 MORE ADULTS 6. 18=30 - 12 MORE ADULTS 7. 21=35 - 14 MORE ADULTS 8. 24=40 - 16 MORE ADULTS 9. 27=45 - 18 MORE ADULTS 10. 30=50 - 20 MORE ADULLTS 11. 33=55 - 22 MORE ADULTS 12. 36=60 - 24 MORE ADULTS 13. 39=65 - 26 MORE ADULTS SOME THINK IF YOU MULTIPLY BY 2 ( WHERE DID THE 2 COME FROM? WELL EVERY 3 KIDS THERE IS 5 ADULTS THAT IS 2 MOR EXTRA ADULTS) THAT WILL GIVE YOU 26 THAT IS 13 BECAUSE ( 13X2 = 26) now let’s go back to the original ratio which was 3:5 so let’s see 13 MULTIPLY by 3 gives me 39 KIDS and also do the same for the other part 13 multiply BY 5 GIVES ME 65 ADULTS THAT IS 26 MORE ADULTS ARE YOU STILL CONFUSED LETS SIMPLY 65-39= 26 I HOPE THAT HELPS
@fergusthomson8215 жыл бұрын
So is his final answer wrong?
@NoxiousLynx2 жыл бұрын
thank you! this was very well communicated unlike the dude in the video who didn't communicate clear enough.
@khandohenders54783 жыл бұрын
Thank you so much, ive struggled with this for long, but you have made it simple for me to understand.
@LordVader066 Жыл бұрын
understand this ratio
@sprite35147 жыл бұрын
That odd pause at the begging......
@zynkui52066 жыл бұрын
Cindy Prokop beginning*
@nickgill66394 жыл бұрын
That is what you noticed
@chaaks98166 жыл бұрын
hahah i didnt get it at all
@tarungogoi75606 жыл бұрын
Thanks for making the video it helped me in the exam room
@yolandasteenkamp38623 жыл бұрын
ok so this is a easy way so the ratio of kids to adult at a party 5:2 ( It's really simple this is what you do ) Add together the ratio ( 5+2=7) Than the answer which is 7 multiply by the ratio example (7*5=35) and also ( 7*2=14) there are 35 kids and 14 adults
@dizzysdiamonds Жыл бұрын
Wow ...that's how you start a video !!! Why didn't I have someone like you 25 years ago
@JanexConfetti3 жыл бұрын
doesn't his fingers hurt from all that writing on the board
@appleplays90473 жыл бұрын
Prob
@effecteyvee8642 жыл бұрын
they hurt from this ratio
@ameenjakobra33732 жыл бұрын
i didnt understand from this method :(
@Mary-cd3cl3 жыл бұрын
You know what I’m going to subscribe because you’re awesome
@mashupervance54045 жыл бұрын
Its so hard Uhmm.. 😤😥😧😩😰I have a question😑😮😴 | in 5:2= 2.5:2.2 | where did you get 2•5 and 2•2?😒😫😫😫
@kul7952 жыл бұрын
Didn't understand anything
@saritasalome5304 Жыл бұрын
I don’t understand the 2nd problem 😩 how you get the 13 ?
@SebastianJc8 күн бұрын
I did the thinking of 2x7 is 14 then 5x7 is 35
@jamesshaw36223 жыл бұрын
One of the worst parts about math for me was learning how to do one problem, multiple ways. I can learn how to solve a math problem multiple ways, but it usually confuses me in the end, during the step-by-step process. I get the multiple solutions confused with each other.
@Kraeeer7i Жыл бұрын
The intro is so nostalgic
@galaxycookie754 жыл бұрын
This is helpful as now we can not go to school because of corana, we can learn how to do Ratios from here , l was confused in Ratios but after watching this video l am not so thanks , l will share this video with my class.
@galaxycookie754 жыл бұрын
Btw the start was kind of weird because you had a little pause in the start
@vegtea16376 жыл бұрын
This helped me a lot
@kxcrimson14548 жыл бұрын
you don't explained the problem!! you just worked it out like if we know!! very confusing!! please explain why u are doing each step!!! WHY!!!!
@abiudwilsonkavara35755 жыл бұрын
Total conversion cost is N$500 000. Direct labour and the other element of conversion cost are in the ratio of 3 : 2 to total conversion cost. Direct material is 5 times more than indirect material and 3 times more than direct labour. Indirect material is already included in the N$500 000 conversion cost. Required: Calculate the following: Direct material used Direct labour Manufacturing overheads Manufacturing cost Primary cost
@an.jahnke7632 Жыл бұрын
i'd bet big money that your students love you.!, Very nice presentation.
@brisk94594 жыл бұрын
Where did 13 come from in the 2nd problem
@VaresBoii4 жыл бұрын
That’s what I’m still trying to figure out!?!?!??
@VV-sl6eq4 жыл бұрын
It’s the difference , so 5 minus 3 = 2units, which is 26, so one unit is 26 divided by 2 which equals 13 :)
@sapphirecranfield383 жыл бұрын
Angela Yang I don't understand ;-;
@VV-sl6eq3 жыл бұрын
@@sapphirecranfield38 So the child's units is 3 and the adult's units is 5. You want to find the difference, so the difference of units is 5-3=2 units. But as the problem says, the difference of adults and kids is 26. Since 2 units and 26 are both the difference of adults and kids, 1 unit equals 26 ➗ 2 = 13. You probably don't need this part, but the kids are 5 units and 1 unit equals 13, so there are 65 kids.
@sapphirecranfield383 жыл бұрын
Angela Yang that helped a lot tysm
@evangelineperez76889 ай бұрын
I am so confused
@shreyadhap99813 жыл бұрын
Really good for me to learn
@raychellekrisbalolong92723 жыл бұрын
I don't understand the second one
@BigDawg-uv2mz6 жыл бұрын
where did u get two to multiply
@sk_davron11429 жыл бұрын
it did not help me at all what you did does not make any sense at all thank you for your video but it was hard to understand
@YAABKA16 жыл бұрын
shorter way is 26 divide by 2 =13 Than 13*3=39 kids 13*5 = 65 adults isn't that easy
@YAABKA16 жыл бұрын
the ratio of kids to adult at a party 5:2 ( It's really simple this is what you do ) Add together the ratio ( 5+2=7) Than the answer which is 7 multiply by the ratio example (7*5=35) and also ( 7*2=14) there are 35 kids and 14 adults
@zuhaibahmed60786 жыл бұрын
why did not you do same as you solve the first Q. i.e 5:2 means 5+2=7 then 7x5=35, 7x2=14. Is it not the same as first ? why can't we do 5+3=8, then 8x5=40, 8x3=21?
@tonysimon8436 жыл бұрын
Sk_Davron 123 that's so true hi my friend
@tonysimon8436 жыл бұрын
It's very nice to wach but board👎👎👏👊😜😮💣💣🔫🔫🎭💊🅿
@deepi17233 жыл бұрын
I see more than 5 videos but i can't understand when i see this video my all concepts are clear
@allanlam76697 жыл бұрын
For everyone that doesn't understand immediately, you will, eventually. Because whilst he doesn't write down the words "group", or "grouping", he mentions and emphasizes it, and really stresses it throughout the video. The fact that he doesn't specifically outline it, makes the video especially memorable and fulfilling to understand, because you really have to concentrate, both on what he writes, and on what the says, at the same time! I thoroughly enjoyed it after watching it a few times to fully understand it. You realise what how experienced he is. He earns my trust. It may not kick in today, but it will stick longer and when we need it, it will be there.
@pilotrahulrajbhar4 жыл бұрын
Why dont u cross multiple
@linacherpelis316 Жыл бұрын
2023 here!
@markxsons933010 жыл бұрын
Daniel's mother gives Daniel and his brother the same amount of allowance every month. By mistake, Daniel gets more allowance this month. The ratio of his allowance to his brother's allowance is 7 : 4. Daniel decides to give his brother some money so that both of them will have the same amount. If Daniel has $238 now, how much must Daniel give to his brother? Plz reply...
@leonardbriffa21939 жыл бұрын
Mark Xsons ratio 7:4 and daniel gets 238dollars. thus 7 times X is 238. X is 238/7=34. now find his bros pay. 4x34=136. total dished out by mom. 238+136=374,divide by 2=187 each but daniel got more and his bro less--238-187=51 dollars he needs to give his bro to come equal
@eternalending88076 жыл бұрын
136
@original2858 Жыл бұрын
Cross multiply doesn’t work for these problems. Basically if is 39 cows: 26 pigs and you have 52 pigs how many animals together? Answer is 117. 26+26 is 52 so you know it’s 2 times you have to do 39 cows. Which is 78 then just add 56 and 117 is total animals.
@pheonadasilva66085 жыл бұрын
its pretty easy thanks for this video it helped me very much
@ernestnadome91204 жыл бұрын
U make it seem so easy
@jasmeena20086 жыл бұрын
Please could you write the English translation below (cc)
@rarokadia3 жыл бұрын
It means that they are captions
@zaviondenton79922 жыл бұрын
In a bicycle shop, the ratio of tricycles to bicycles is 6:11. Calculate the amount of bicycles in the shop given that there are 90 tricycles in the shop.
@chalky666 Жыл бұрын
bro this has helped alot not gonna lie
@Gen3ralGrimReaper3 жыл бұрын
On the first radio problem, how did he figure out he needed to multiple 2•5 & 2•2? On the second ratio, how did he figure out 13? I’m lost.
@HayxChannel16103 жыл бұрын
Same 😌
@pamelachuks5205 Жыл бұрын
@@HayxChannel1610 am also lost l don't know how he realized 13
@l0nlym1lk173 жыл бұрын
yooooooo math test tomorrow. and I'm British so you know im gonna do badly if I don't revise. wish me luck guys
@YAABKA16 жыл бұрын
1. 3=5 - 2 MORE ADULTS 2. 6=10 - 4 MORE ADULTS 3. 9=15 - 6 MORE ADULTS 4. 12=20 - 8 MORE ADULTS 5. 15=25 - 10 MORE ADULTS 6. 18=30 - 12 MORE ADULTS 7. 21=35 - 14 MORE ADULTS 8. 24=40 - 16 MORE ADULTS 9. 27=45 - 18 MORE ADULTS 10. 30=50 - 20 MORE ADULLTS 11. 33=55 - 22 MORE ADULTS 12. 36=60 - 24 MORE ADULTS 13. 39=65 - 26 MORE ADULTS SOME THINK IF YOU MULTIPLY BY 2 ( WHERE DID THE 2 COME FROM? WELL EVERY 3 KIDS THERE IS 5 ADULTS THAT IS 2 MOR EXTRA ADULTS) THAT WILL GIVE YOU 26 THAT IS 13 BECAUSE ( 13X2 = 26) now let’s go back to the original ratio which was 3:5 so let’s see 13 MULTIPLY by 3 gives me 39 KIDS and also do the same for the other part 13 multiply BY 5 GIVES ME 65 ADULTS THAT IS 26 MORE ADULTS ARE YOU STILL CONFUSED LETS SIMPLY 65-39= 26 I HOPE THAT HELPS
@otakuelai47612 жыл бұрын
Its the little things that counts❤
@crocodileguy46875 жыл бұрын
I think you did a good job explaining
@silxbeats Жыл бұрын
You made this video very interesting to watch...
@tocacuddles9439 Жыл бұрын
Ty
@painful47116 жыл бұрын
Umm my first question would be where at
@AtlantisPKXD3 жыл бұрын
This is alot of help
@GohramXD4 жыл бұрын
I hate maths PLZ ✋ 🛑 STOP 💔
@tarungogoi75606 жыл бұрын
Very nice video I loved this method
@johnmarkalambra23955 жыл бұрын
me too
@Mohammadaliedits Жыл бұрын
"So were done" *stares into your soul*
@shainaswaby42104 жыл бұрын
this helped a lot thank you I have a test on Monday and I now have a better understanding of ratio thank you so much 🥰
@dainaokraku2523 Жыл бұрын
Did you do well gess not😢
@Kattie19955 жыл бұрын
Wait why did you do 2 times 2?
@DaRealNoobKing Жыл бұрын
Theres a method for 3 ratios so imagine 36 docs for student A, B and C and ratio is 1:3:5 now 1+3+5=9 36/9=4 4x1=4 4x3=12 and 4x5=20 so 4, 12, 20 for the people
@crazyy4884 жыл бұрын
Pls dont judge my working out First question 14 divide by 2 = 7 7 X 5 = 35 Secound question 3 : 5 the gap between 3 and 5 is 2 and there is 26 more then kids, 2 divided by 26 = 13, 13 X 3 = 39
@mariammariam-ue1sy5 жыл бұрын
You made it complicated but Thank you though.
@BaelieYoung10 жыл бұрын
What kind of board are u using in this video?
@vincentxie30905 ай бұрын
Hello, are you still active in your channel
@genricmaraon768110 жыл бұрын
i dont under stand a think man how did u come up on dose numbers...pls explain it sir.
@YAABKA16 жыл бұрын
1. 3=5 - 2 MORE ADULTS 2. 6=10 - 4 MORE ADULTS 3. 9=15 - 6 MORE ADULTS 4. 12=20 - 8 MORE ADULTS 5. 15=25 - 10 MORE ADULTS 6. 18=30 - 12 MORE ADULTS 7. 21=35 - 14 MORE ADULTS 8. 24=40 - 16 MORE ADULTS 9. 27=45 - 18 MORE ADULTS 10. 30=50 - 20 MORE ADULLTS 11. 33=55 - 22 MORE ADULTS 12. 36=60 - 24 MORE ADULTS 13. 39=65 - 26 MORE ADULTS SOME THINK IF YOU MULTIPLY BY 2 ( WHERE DID THE 2 COME FROM? WELL EVERY 3 KIDS THERE IS 5 ADULTS THAT IS 2 MOR EXTRA ADULTS) THAT WILL GIVE YOU 26 THAT IS 13 BECAUSE ( 13X2 = 26) now let’s go back to the original ratio which was 3:5 so let’s see 13 MULTIPLY by 3 gives me 39 KIDS and also do the same for the other part 13 multiply BY 5 GIVES ME 65 ADULTS THAT IS 26 MORE ADULTS ARE YOU STILL CONFUSED LETS SIMPLY 65-39= 26 I HOPE THAT HELPS
@siouxdfroy8455 жыл бұрын
YAABKA1 I ain’t reading that
@almacastro14124 жыл бұрын
Nice video
@tristantiongson75443 жыл бұрын
Ty :)
@xhlcus884 жыл бұрын
*That reminds me of body parts*
@Team_sza3 ай бұрын
I THOUGHT I WAS THE ONLY ONE 😭
@hanna71902 жыл бұрын
Pov: it's 2021 and ur watching this vid for ur module
@scholium33708 жыл бұрын
that was a beautiful presentation, such a variety of techniques too! well done.
@vincentxie30905 ай бұрын
I'm pretty sure he is using a interactive whiteboard for these question
@kingdomman19474 жыл бұрын
what if . the numbers where odd
@pramodrekhamys4 жыл бұрын
Thank you very much for the vedio
@tarungogoi75606 жыл бұрын
😊😊😊nice video
@Laurel30005 жыл бұрын
Thx 4 the help! (You saved me with my math homework!)
@bonk5492 жыл бұрын
I have test tommorow im nervous but this will help me out so goodluck me
@johndungca25055 жыл бұрын
ty sir
@yscarnage83453 жыл бұрын
thanks bro i can use this method for my ppe exams
@doublerubyadventures Жыл бұрын
I'm new thank you for the help and I loved the energy so I'm a new subscriber
@spaceboiclub5 жыл бұрын
Thank you very much! :)
@cannadybell5566 Жыл бұрын
I have a test wish me luck
@iamghostofuchiha67865 жыл бұрын
5:2 5 -*14 2 5*7-35
@nmerimgbeahuruike76294 жыл бұрын
Very informative and the concept is clearly taught.
@ashleymaluks6572 ай бұрын
I understood the first example but the second one yhoo i don't understand it completely
@lindacarter45439 жыл бұрын
Are you the one that does number theory?
@cookielife95704 жыл бұрын
Ratio always messes my mind up and makes me so confused.. 😑
@unbeatablevito504 жыл бұрын
Same
@echo46194 жыл бұрын
Same
@Ahmad-ne9co2 жыл бұрын
Proved helpful.... Cool method
@ratiogod91582 жыл бұрын
This ratio cooler
@Asphodel_gabby Жыл бұрын
THANK YOU
@idahseoforeng14923 жыл бұрын
I did not understand but now I do thanks
@ranger7yago3064 жыл бұрын
4:20 so confusing the dots :(
@SaifUllah-ii3dp4 жыл бұрын
dots means time so 5.2 means 5x2 :)
@0menadds5 жыл бұрын
Cool ratio stuff. Thanks
@kais858510 жыл бұрын
Good Job buddy.. keep it up!
@sararani63314 жыл бұрын
Who is the X in the second question
@jamesnoellejavier79903 жыл бұрын
Why not just add the ratio then multipy the ratio?
@justinmwansa8366 Жыл бұрын
I wish you a very happy birthday on
@lilithperalta51266 жыл бұрын
The dot should be x sir...
@siouxdfroy8455 жыл бұрын
Katsuki Bakugou x and a dot is the same thing, guessing you aren’t in middle school? 😐
@MsHarikrisna5 жыл бұрын
Can somebody help me solve this? Nadeem had some local and foreign stamps. The ratio of the number of local stamps to foreign stamps was 3:4. She gave away 28 foreign stamps and the ratio of the number of local stamps to the number of foreign stamps became 9:8. How many local stamps did Nadeem have? How many foreign stamps did Nadeem have in the end? Pls. help, need to explain and practice my son about Ratio.
@udow.71673 жыл бұрын
X = number of local stamps; Y = number of foreign stamps I.) X + 4/3X = Y II.) X + 8/9X = Y - 28 Now you put I.) into II.) to replace the Y: III.) X + 8/9X = (X + 4/3X) - 28 some minor calculation to get X: X + 8/9X = (X + 4/3X) - 28 |+28 X + 8/9X + 28 = X + 4/3 X | 4/3=12/9 => X + 8/9X + 28 = X + 12/9X |-1X - 8/9X 28 = 4/9X |*9/4 63 = X. This is the number of local stamps. 63 * 4/3 = 84. This is the number of foreign stamps in the beginning. 63:84 - this is the initial ratio of 3:4. 84 - 28 = 56. This is the number of foreign stamps in the end. The ratio is now 63:56 or 9:8.
@derroz3157 Жыл бұрын
If there are 100 adults 40 kids should show up
@hschelpdesk2710 Жыл бұрын
This is 2023 and I didn't understand it
@dainaokraku2523 Жыл бұрын
I do not understand the 13 but love the humor
@almirabah2351Күн бұрын
Same here naa😩
@rainbowng18146 жыл бұрын
So i have a question If 700coins are shared among A,B and C. It is known that the ratio of A to B is 6:7, and the ratio of A to C is 2:5. Find the number of coins in C's share. So my problem is, I know A:B =6:7 , A:C= 2:5 But to find C's share out of 700, I need to find A:B:C, how do I calculate that?
@udow.71673 жыл бұрын
You take A as X. B in that case would be 7/6X. C is 5/2X Now it's easy: X + 7/6X + 5/2X = 700 Makes X = 150. A = 150; B = 150 * (7/6); C = 150 * (5/2) A = 150, B = 175; C = 375.