Question

2728 is divisible by 2 and it is also divisible by .

• A. 7
• B. 11
• C. 3

Answer 1

The correct option is B 11

Here, 2728 is divisible by 11.

Divisibility test for 11: If the difference between the sum of digits in odd places and sum of digits in even places of a number is a multiple of 11 or equal to zero, then the given number is divisible by 11.

Here, the number in even places are
7, 8 and the numbers in odd places are 2, 2.
Now, adding the number in even places and odd places internally
For even place, 7 + 8 = 15
For odd place, 2 + 2 = 4.
Now, their difference, i.e
15 - 4 = 11
$\therefore$ 343 is divisible by 11, since their difference is also divisible by 11.