Level 2 PSLE The sum of two numbers is 40. One of the numbers is a multiple of 7. The other number is a factor of 25. What is the difference between the 2 numbers?
Number 1 + Number 2 = 40
Number 1 is a factor of 25.
Factors of 25: 1, 5, 25
Number 2 is a multiple of 7.
To be a multiple of 7, Number 2 must have no remainder when divided by 7.
Number 1 |
Number 2 |
Is Number 2 is a multiple of 7? |
Is the remainder 0? |
25 |
40 - 25 = 15 |
15 ÷ 7 = 2 r 1 |
x |
5 |
40 - 5 = 35 |
35 ÷ 7 = 5 r 0 |
✓ |
Difference between the 2 numbers
= 35 - 5
= 30
Answer(s): 30