Level 2 PSLE The sum of two numbers is 79. One of the numbers is a multiple of 7. The other number is a factor of 27. What is the difference between the 2 numbers?
Number 1 + Number 2 = 79
Number 1 is a factor of 27.
Factors of 27: 1, 3, 9, 27
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? |
27 |
79 - 27 = 52 |
52 ÷ 7 = 7 r 3 |
x |
9 |
79 - 9 = 70 |
70 ÷ 7 = 10 r 0 |
✓ |
Difference between the 2 numbers
= 70 - 9
= 61
Answer(s): 61