Question

In 64*2456 replace * by a digit so that the number formed is
divisible by 11

Answer 1

Answer:

=8....

Step-by-step explanation:

The difference between the sum of digits of odd places and sum of digits of even place is divisible by 11 or it is zero

Now 6+4+∗+6−5+2+4 [ which is divisible by 11 ]

16+∗−11 is divisible by 11

5+x is divisible by 11

∴∗is 6.

(ii) 86×6194

It is divisible by 11

The difference between the sum of digits of odd places and sum of digits of even places is divisible by 11 or its is zero.

Now 4+1+∗+8=13+∗

9+6+6=21

21−(13+∗) is divisible by 11

21−13−∗ is divisible by 11

8−∗ is divisible by 11

∴∗ is 8.

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