fries (F) burgers (B) drinks(D)

10 F + 10B =50 ---> F+B=5

10D +5B=30 ---> 2D+B=6

By comparing the two statements above, we can see that when 2 drinks is bought instead of a fries, the cost increased by $1.

Noted. Thks.

Can also try guess and check method :) Since 5 = 3 + 2 or 5 = 1 + 4, Try 5 = 3+ 2, f=3, b =2. 6 = 2d + b, since b =2 then d = 2. Solved.

Product of the top layer numbers is equals to the sum of the bottom layer of numbers. 8+?＝2x7 ?＝6.

for the first box, top 4x5=20 which is equal to below 11+9=20, so the ans is 6

Thanx a million 😂😂

2x7-8=6

6

I think it's 8. First box total is 29, second box is 27, third box is 25, last box is 23.

For number patterns like this, we usually look at a square as a whole. In other words, the pattern is WITHIN the square itself and is not affected by other squares. of course, i am not denying the fact that there is a diff of 2 between each sqr, but if there is a pattern within each sqr, its presence is more superior than the pattern outside each sqr

This kind of question has no practical value.

😍 thank u thank u!! I am so thankful because i dunno how to explain.. 👏

No Prob! ^.^

I learned new things too.

Good for all :D

Hi Zhong Shu Hao, would you happen to be a Maths tutor? I am looking for one for my girl.

I am a JC 1 :D

Lol thanks eh, but you have potential of a Math Tutor. ;)

Lol planning to actually! :)

Really? If you planning part time tutor now or soon, can let me know? My girl P2 this year.

At least another 3-4 years down the road! haha still have NS...

lol I am still keen, my #2 girl is 4 this year.

Study hard!!!👏👏👏👏💪💪💪💪 U have the potential! Ur mum sure proud of u! 😊

8+8+6+6 = 28

6×4+4=28

8-2=6 6×4=24 24+4=28

Thank u everyone for the many methods! 😍

er... firstly... this is science 😅 But anyways, about 70~80% of the plastic has a density higher than 1g/cm∧3.

The key word is solid. U prob had the wrong perception cos you are thinking of plastic ball filled with air

Tks for the highlight!sorry that I posted this question here!😓

A few ways to do this ... this is the one I typically use for it.

With a model... but with different values Tom bought some chocolates and gave half of them to Jim. Jim bought some sweets and gave half of them to Tim. Tim ate 24 sweets and Jim ate 36 chocolates. The ratio of Tim's sweets to chocolates became 1:7. The ratio of Jim's sweets to chocolates became 1:4. How many sweets did Jim buy?

but i find kids struggle to create this model

These style of remainder questions seem to becoming more and more frequent.

If the last part is a little difficult to explain or a bit too much like algebra, you can replace the equation with this (after you multiplied 9u + 120 by 4 and 20u x 5) ....

Thank you very much for the solutions...