Question

Using divisibility tests determine which of the following numbers are divisible by 11 ?

901153

10824

7138965

5445

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Answer 1

Answer:

1 ) Sum of the digits at odd places=3+1+0=4

Sum of the digits at even places=5+1+9=15

Difference=15−4=11

The difference between the sum of the digits at odd places and the sum of the digits at even places is 11, which is divisible by 11. Therefore, 901153 is divisible by 11.

2 ) Therefore, 5445 is divisible by 11. Difference is divisible by 11. Therefore, 10824 is divisible by 11

3 ) Difference is not divisible by 11. Therefore, 7138965 is not divisible by 11. Difference is divisible by 11. Therefore, 70169308 is divisible by 11.

4 ) Sum of the digits at odd places =5+4=9

Sum of the digits at even places =4+5=9

Difference =9−9=0

As the difference between the sum of the digits at odd places and the sum of the digits at event places is 0, therefore, 5445 is divisible by 11.

Step-by-step explanation:

Answer 2

Question ⤵️

Using divisibility tests determine which of the following numbers are divisible by 11 ?

901153

10824

7138965

5445

Answer ⤵️

d) 5445 is divisible by 11.

Hope it helps you ✌️

Step-by-step explanation:

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