The number which is formed by writing any digit 6 times (eg. 111111, 222222, etc.) is always divisible by which of the following options?
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Answer:
7, 11 and 13
Step-by-step explanation:
Let the no. be 'aaaaaa' = N
(1 ≤ a ≤ 9)
N = a[111111]
As '111111' is divisible by 7, 11 and 13
∴ N is divisible by 7,11 and 13.
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