Question

39*43 replace * by digit to make the number divisible by 11

Answer 1

add odd place digit=3+x+3
add even place digit=9+4=13
x must be different between odd place digit and even place digit
13-6=7
x=7
39743/11=3613

Answer 2

I have learnt this method. If you know it!

39_43

3+_+3= 6+_
9+4= 13

we have to subtract, and if the answer is 0 or 11, then the number is divisible by 11.

So,
13-6=7

so we either make it 0 or 11. Here we make it 0.

So, in the blank, it will be 7.

39743= 3+7+3-9+4
          = 0


Hope it helps!
hope you understood.

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