Of the four numbers represented on the number line above, is r closest to zero?

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Source: — Data Sufficiency |

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BTGmoderatorDC wrote:
Mon Jul 06, 2020 7:30 pm
Number line.jpg

Of the four numbers represented on the number line above, is r closest to zero?

(1) q = –s
(2) –t < q

OA A

Source: Official Guide
Let's take each statement one by one.

(1) q = –s

=> q + s = 0

Since q + s = 0, we see that 0 lies at the mid-point of q and s. So, r would lie either on the right side of 0 or on the left side of 0; in either case, r is closest to 0. Sufficient.

(2) –t < q

We do not have any information about r and s. Either r or s can be closest to 0. Insufficient.

Correct answer: A

Hope this helps!

-Jay
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