PL BM P3L47 Heuristics Review 2 WS (2022)

Primary 3

Boost! Math

Name HeuHreisutircist:iRcse:vRiewvie2w(L2es(Lsoesns4o7n)47)
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Primary 3: Boost! Math

Show your working clearly for each sum.

1. Mrs. Lee is older than her son, Jack by 26 years.
Mrs. Lee’s age was 3 times Jack’s age 5 years ago.
How old is Jack now?

Ans:

2. Cyril takes 8 minutes to climb the stairs from the 1st floor to the 5th floor of a building.
How many minutes does he take to climb the stairs from the 2nd floor to the 8th floor?
(Draw a diagram)

1Ans:

Primary 3: Boost! Math

3. James paid $287 for 5 tennis rackets and 3 soccer balls. One tennis racket cost $19
more than one soccer ball. What is the cost of one tennis racket?

Ans:
4. Paul collected 150 figurines. Jake collected 120 figurines. How many figurines must

Paul give to Jake so that Jake has two times as many figurines as Paul?

2Ans:

Primary 3: Boost! Math

5. The figure below is made up of 10 identical rectangles. The length of each rectangle is
10 cm. The breadth of each rectangle is 7 cm. Find the perimeter of the figure.

Ans:
6. A snail crawls up a lamp post. The lamp post is 10 m in height. It crawls up 5 m in the

day and slips 4 m at night. How many days does the snail take to reach the top?

Ans:

3

Primary 3: Boost! Math

7. Ann and Ben have $31. Ann and Chris have $32. Ben and Chris have $29.
Find the amount of money Ann, Ben and Chris each have.

Ans: Ann: , Ben: , Chris:

8. There are 30 more apples in crate A than in crate B. If 12 apples are transferred from
crate B to crate A, there will be 3 times as many apples in crate A as crate B.
How many apples are there altogether?

Ans:

4

Primary 3: Boost! Math

9. Laura baked 38 more tarts than pies. After she sold 63 tarts, the number of pies was
twice as many as the number of tarts left. How many tarts did Laura bake at first?

Ans:
10. Harry has $28 more than William.

If Harry gives $5 to William, how much more money does Harry have than William?

5Ans:

Primary 3: Boost! Math

11. The sum of two whole numbers, A and B, is 39. The sum of 2 times of A and 3 times
of B is 91. Find the value of A.

Ans:
12. Train A and Train B had a total of 385 passengers. After 18 passengers moved from

TrainA to Train B, TrainA had 4 times as many passengers as Train B.
How many passengers were there in Train A at first?

Ans:

6

Primary 3: Boost! Math

13. There was a total of 960 ml of orange juice in jugs A and B. Jug A contained 4 times
as much orange juice as Jug B. How much orange juice must be poured from Jug A
into Jug B so that both jugs will have the same amount of orange juice?

Ans:
14. Mr Moo has twice as many ducks as goats. Altogether, there are 184 legs.

How many ducks does Mr Moo have?

Ans:

7