Level 2 PSLE The sum of two numbers is 50. One of the numbers is a multiple of 9. The other number is a factor of 25. What is the difference between the 2 numbers?
Number 1 + Number 2 = 50
Number 1 is a factor of 25.
Factors of 25: 1, 5, 25
Number 2 is a multiple of 9.
To be a multiple of 9, Number 2 must have no remainder when divided by 9.
Number 1 |
Number 2 |
Is Number 2 is a multiple of 9? |
Is the remainder 0? |
25 |
50 - 25 = 25 |
25 ÷ 9 = 2 r 7 |
x |
5 |
50 - 5 = 45 |
45 ÷ 9 = 5 r 0 |
✓ |
Difference between the 2 numbers
= 45 - 5
= 40
Answer(s): 40