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D. 70
Since a%b = 6, the divisor b must be greater than 6, so b ≥ 7.
Since c%d = 9, the divisor d must be greater than 9, so d ≥ 10.
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Min, value for b = 6+1 = 7.
Min value for d = 9+1 = 10.

To minimize (b×d), use the smallest possible values:
(b×d=7×10=70)


Answer: Option D
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the divisor is always greater than the remainder
so min value for b and d are 7 and 10
So the min possible value of bxd = 70

Hence option D
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ExpertsGlobal5
Function x%y represents the remainder when a positive integer x is divided by another positive integer y. If a, b, c, d are positive integers and a%b = 6 and c%d = 9, what is the minimum possible value of b x d?

A. 54
B. 60
C. 63
D. 70
E. Greater than 70

D is the correct answer choice.

Video explanation:

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