Level 2 PSLE The sum of two numbers is 82. One of the numbers is a multiple of 9. The other number is a factor of 20. What is the difference between the 2 numbers?
Number 1 + Number 2 = 82
Number 1 is a factor of 20.
Factors of 20: 1, 2, 4, 5, 10, 20
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? |
20 |
82 - 20 = 62 |
62 ÷ 9 = 6 r 8 |
x |
10 |
82 - 10 = 72 |
72 ÷ 9 = 8 r 0 |
✓ |
Difference between the 2 numbers
= 72 - 10
= 62
Answer(s): 62