In a row of children, exactly 7 children stand between Dia and Ekam. Dia and Ekam then interchange places. How many children now stand between them?

7Correct answerYour answer8Correct answerYour answer9Correct answerYour answer14Correct answerYour answer

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CorrectNot quiteAnswer A

Correct answer: A

An interchange moves each of the two into the other's place; nobody else moves.
The same two places are still occupied, so the same 7 children stand between them.

Worth noting

14 doubles the gap as if each had moved past the other's side. The gap between two places does not depend on who stands in them.

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Explanation