Question 31

In a queue, A is eighteenth from the front While B is sixteenth from end. If C is twenty fifth from the front and is exactly in the middle of A and B, then how many persons are there in the queue?

Solution

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A is 18th from the front and C is 25th from the front.
It means that there are 6 people between A and C.
As C is in the middle of A and B, there must be 6 people between B and C.
This implies that B is 32nd from the front and 16th from the end which implies that there are 32 + 16 - 1 = 47 students in the row.

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