Level 2 PSLE The sum of two numbers is 81. One of the numbers is a multiple of 8. The other number is a factor of 27. What is the difference between the 2 numbers?
Number 1 + Number 2 = 81
Number 1 is a factor of 27.
Factors of 27: 1, 3, 9, 27
Number 2 is a multiple of 8.
To be a multiple of 8, Number 2 must have no remainder when divided by 8.
Number 1 |
Number 2 |
Is Number 2 is a multiple of 8? |
Is the remainder 0? |
27 |
81 - 27 = 54 |
54 ÷ 8 = 6 r 6 |
x |
9 |
81 - 9 = 72 |
72 ÷ 8 = 9 r 0 |
✓ |
Difference between the 2 numbers
= 72 - 9
= 63
Answer(s): 63