Answer:

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A number is divisible by 11 when the ALTERNATING sun of the digits and then subtracted are divisible by 11 or EQUAL to 0.

a) 5445

5+4 = 9

4+5 = 9

9-9 = 0

So, 5445 is divisible by 11

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b) 10824

1+8+4 = 13

0+2 = 2

13-2 = 11

So, 10824 is divisible by 11

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c) 7138965

7+3+9+5 = 24

1+8+6 = 15

24-15 = 9

So, 7138965 is not divisible by 11

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d) 70169308

7+1+9+0 = 17

0+6+3+8 = 17

17-17 = 0

So, 70169308 is divisible by 11

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E) 10000001

1+0+0+0 = 1

0+0+0+1 = 1

1-1 = 0

So, 10000001 is divisible by 11

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F) 901153

9+1+5 = 15

0+1+3 = 4

15-4 = 11

So, 901153 is divisible by 11

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