In which month were the loans at the two branches closest to each other?

The table shows the number of books borrowed from each of two library branches over four months.

Branch | March | April | May | June
North | 420 | 480 | 510 | 390
South | 360 | 330 | 440 | 480

Answer and explanation

Correct answer: D. March, with a difference of 60

  1. Step 1: Differences: March , April , May , June . Step 2. The smallest is March, at 60. Answer: March. Why not the others: May's difference is 70, not 60, and the others are larger.

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