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In each of the following questions , thr...

In each of the following questions , three statements of numbers following same rules are given . Find the rule and accordingly find the value of the number ?
If 3*7 = 58, 5*6 = 61, 3*2 = 13 , then 5*4 = ?

A

39

B

41

C

81

D

90

Text Solution

Verified by Experts

The correct Answer is:
B
The rule is a*b ` = a^2 + b^2`
3*7 = `3^2 + 7^2 = 9 + 49 = 58 etc`
`therefore ` 5*4 = `5^2 + 4^2 = 25 + 16 = 41`
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