Question

if 87+92=18
, 57+83=13,
12+61=4,
62+31=?

Answer 1

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Answer 2

The Answer is $6$

Step-by-step explanation:

Given,

If $87+92=18$

  $57+83=13$

  $12+61=4$

  $62+31=?$

$1st$ $87+92=[(8+7)+(9-2)-4]=18$

$2nd$ $57+83=[(5+7)+(8-3)-4]=13$

$3rd$ $12+61=[(1+2)+(6-1)-4]=4$

Similarly,

$4th$ $62+31=[(6+2)+(3-1)-4]=6$

∴ The Answer is $6$