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Question

Insert the missing number in the following:
2/3, 4/7, ? , 11/21, 16/31

a.

10/8

b.

6/10

c.

5/10

d.

7/13

Answer: (d).7/13

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Q. Insert the missing number in the following: 2/3, 4/7, ? , 11/21, 16/31

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