Answer : B
Milk left for the evening = 1 - 2/8 = 6/8
Milk consumed in the evening = 3/5 of 6/8 = 3/5 x 6/8 = 18/40
Total milk consumed = 2/8 + 18/40 = 28/40
Milk left = 1 -28/40 = 12/40 = 3/10
First add the numbers in opposite and square it.
Do the same for all the three pairs,
Finally add the three results.
You will get the number at the centre
Example: 1st one
1+6= 7
7^2 = 49
9 + 4 = 13
13 ^ 2 = 169
3+ 5 = 8
8^ 2 = 64
49+169+64 = 282
All the best...............