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Ranking and Ordering · Question 27 of 66

Question 27

EasyOriginal question

Gurpreet and Fatima stand in a row facing north. Gurpreet is 9th from the left end and Fatima is 14th from the right end. When they interchange places, Fatima becomes 21st from the right end. How many people are in the row?

Options for question 27

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. After the swap Fatima stands in Gurpreet's old place.

  2. That place is 9th from the left and 21st from the right.

  3. Total =9+21−1=29= 9 + 21 - 1 = 29.

Worth noting

22 is 9+14−19 + 14 - 1: Gurpreet's and Fatima's ORIGINAL positions describe two different places, so they cannot be added.

Concept
Interchange: pairing the new and old positions of one place
Typical time
40 s
Your time
—
The rule this testsInterchanged positions
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Ten questions from Ranking and Ordering, at your own pace.

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