Question

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

i) 31795071 ii) 1790184​

Answer 1

Step-by-step explanation:

11

Add and subtract digits in an alternating pattern (add digit, subtract next digit, add next digit, etc). Then check if that answer is divisible by 11.

1364 (+1−3+6−4 = 0) Yes

913 (+9−1+3 = 11) Yes

3729 (+3−7+2−9 = −11) Yes

987 (+9−8+7 = 8) No

1. => (3+7+5+7) - (1+9+0+1)

=> 22 - 11 = 11

so it is divisible by 11

2. => ( 1+9+1+4) - (7+0+8)

=> 15 - 15 = 0

so it's division by 11

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Answer 2

Answers are step by step..

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