MathBrush

Practice

Same pattern as Jim and Ken — sweets and chocolates. New numbers, new story. Try each one on paper, then check the working below — or watch it drawn out, the same way the problem above is.

Question 1

Ali, Ben and Carol collect stickers. The ratio of Ali's stickers to Ben's is 5 : 2. The ratio of Ben's stickers to Carol's is 4 : 3. They have 272 stickers between them. How many stickers does Carol have?

Work it out on paper, then check below. ▶ See the working

Question 2

Ali, Ben and Carol collect stickers. The ratio of Ali's stickers to Ben's is 4 : 1. The ratio of Ben's stickers to Carol's is 2 : 3. Carol has 48 stickers. How many stickers do the three have altogether?

Work it out on paper, then check below. ▶ See the working

Question 3

Ali, Ben and Carol collect stickers. The ratio of Ali's stickers to Ben's is 3 : 2. The ratio of Ben's stickers to Carol's is 4 : 3. Ali has 144 stickers. How many stickers do the three have altogether?

Work it out on paper, then check below. ▶ See the working

Question 4

Jia Le, Faris and Meera play badminton for the school CCA and each used shuttlecocks during training. The ratio of shuttlecocks Jia Le used to Faris' is 5 : 4. The ratio of shuttlecocks Faris used to Meera's is 2 : 5. Faris used 120 shuttlecocks. How many shuttlecocks did the three use altogether?

Work it out on paper, then check below. ▶ See the working

Question 5

Mei, Farid and Rina each save some money. The ratio of Mei's savings to Farid's is 1 : 2. The ratio of Farid's savings to Rina's is 3 : 5. Rina has saved $160. How much have the three saved altogether?

Work it out on paper, then check below. ▶ See the working

Question 6

Wei Jie, Aisha and Kumar received money in their red packets during Chinese New Year. The ratio of Wei Jie's red packet money to Aisha's is 5 : 2. The ratio of Aisha's red packet money to Kumar's is 4 : 1. Aisha received $24. How much did Wei Jie receive?

Work it out on paper, then check below. ▶ See the working

Question 7

Class 4A, Class 4B and Class 4C collected paper for the school's recycling drive. The ratio of paper collected by Class 4A to Class 4B is 2 : 1. The ratio of paper collected by Class 4B to Class 4C is 5 : 2. Class 4A collected 80 kilograms of paper. How many kilograms of paper did the three classes collect altogether?

Work it out on paper, then check below. ▶ See the working

Question 8

Ravi, Jun Wei and Siti each have a bag of marbles. The ratio of Ravi's marbles to Jun Wei's is 1 : 4. The ratio of Jun Wei's marbles to Siti's is 2 : 5. The three bags hold 450 marbles between them. How many marbles does Siti have?

Work it out on paper, then check below. ▶ See the working

Question 9

Ravi, Jun Wei and Siti each have a bag of marbles. The ratio of Ravi's marbles to Jun Wei's is 1 : 1. The ratio of Jun Wei's marbles to Siti's is 4 : 5. The three bags hold 208 marbles between them. How many marbles does Jun Wei have?

Work it out on paper, then check below. ▶ See the working

Question 10

Class 5A, Class 5B and Class 5C borrowed books from the school library last month. The ratio of books borrowed by Class 5A to Class 5B is 1 : 1. The ratio of books borrowed by Class 5B to Class 5C is 2 : 1. Class 5A borrowed 40 books. How many books did the three classes borrow altogether?

Work it out on paper, then check below. ▶ See the working

Question 11

Plot A, Plot B and Plot C are three plots in the school garden where pupils planted seeds. The ratio of seeds planted in Plot A to Plot B is 1 : 3. The ratio of seeds planted in Plot B to Plot C is 1 : 1. Plot C had 24 seeds planted. How many seeds were planted in Plot A?

Work it out on paper, then check below. ▶ See the working

Question 12

Zhi Hao, Iman and Priya each bring comic books to swap at recess. The ratio of Zhi Hao's comic books to Iman's is 1 : 1. The ratio of Iman's comic books to Priya's is 4 : 1. Zhi Hao has 40 comic books. How many comic books does Priya have?

Work it out on paper, then check below. ▶ See the working

Question 13

Wen Xin, Haziq and Sanjana each have a jar of sweets. The ratio of Wen Xin's sweets to Haziq's is 3 : 2. The ratio of Haziq's sweets to Sanjana's is 1 : 4. Sanjana has 64 sweets. How many sweets does Haziq have?

Work it out on paper, then check below. ▶ See the working

The working