If 72y is a multiple of 9, where y is a digit, what is the value of y?

Type: MCQ • Marks: 1

A. 0 or 9

B. 1

C. 2

D. 9 only

Explanation

Sum = 7 + 2 + y = 9 + y. If y=0, sum=9; if y=9, sum=18. Both make it a multiple of 9.

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Class 7th Ganita Prakash 1

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