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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 7*3 =52, 9*5 = 86, 3*4 = 13 , then 5*7 = ?

A

30

B

32

C

40

D

57

Text Solution

Verified by Experts

The correct Answer is:
C
The rule is a*b = `a^2 + b`
7*3 = 49 + 3 = 52 etc
` therefore ` 5*7 = 25 + 7 = 32
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MCGROW HILL PUBLICATION-MATHEMATICAL OPERATIONS-EXERCISE 4 (TYPE IV)
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