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If 78*3945 is divisible by 11, where * is a digit, then * is equal to
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- 1
- 0
- 3
- 5
Correct Option: D
A number is divisible by 11, if the difference of the sum of its digits at odd places and the sum of its digits of even places, is either 0 or a number divisible by 11.
∴ (5 + 9 + * + 7) – (4 + 3 + 8) = 0 or multiple of 11
⇒ 21 + * – 15
∴ * + 6 = a multiple of 11
∴ * = 5
