Question

Using divisibility test , determine the following numbers are divisible by 11. a.72545 b.901153

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Answer 1

A number is said to be divisible by 11 if the difference between the sum of the digits at the alternative places starting from the left or the right is either 0 or a number that is divisible by 11.

a) 72545

7 + 5 + 5 = 17

2 + 4 = 6

17 - 6 = 11

Therefore, 72545 is divisible by 11

b) 901153

9 + 1 + 5 = 15

0 + 1 + 3 = 4

15 - 4 = 11

Therefore, 901153 is divisible by 11

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