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Find the missing number, if the same rul...

Find the missing number, if the same rule is followed in all the three figures.

A

42

B

18

C

48

D

56

Text Solution

Verified by Experts

The correct Answer is:
D
The rule followed is :
`18^(2)- 15^(2)= 324- 225= 99 and 99 +9= 11 and 30^(2)- 27^(2)= 900- 729= 171 and 171 + 9= 19`
So, `45^(2)- 39^(2)= 2025- 1521= 504 and 504+9= 56`
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