Question
A. 129
B. 140
C. 156
D. 112
Answer: A
Solution:
Five less than the product of the sum of two corner numbers in each Plaque.
1st Plaque
{(21 + 1) × ( 3 + 2 ) } – 5
= (22 × 5) – 5
= 110 – 5
= 105
2nd Plaque
{(11 + 4) × ( 9 + 5 ) } – 5
= (15 × 14) – 5
= 210 – 5
= 205
3rd Plaque
{(62 + 5) × ( 1 + 1 ) } – 5
= ( 67 × 2) – 5
= 134 – 5
= 129
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