If a number is divisible by both 11 and 13, then it must

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If a number is divisible by both 11 and 13, then it must be necessarily :

1. divisible by (11 + 13)
2. divisible by (13 – 11)
3. divisible by (11 × 13)
4. 429

Correct Option: C

As we know that If a number is divisible by both 11 and 13, then it will be also divisible by multiple of both 11 and 13 i.e.
divisible by (11 × 13) .