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# If P, Q and R are points on the number line, what is the distance betw

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Math Expert
Joined: 02 Sep 2009
Posts: 58340
If P, Q and R are points on the number line, what is the distance betw  [#permalink]

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24 Sep 2018, 06:06
00:00

Difficulty:

15% (low)

Question Stats:

75% (00:47) correct 25% (00:49) wrong based on 54 sessions

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If P, Q and R are points on the number line, what is the distance between Q and R?

(1) The points P and Q are 20 units’ apart.
(2) The points P and R are 25 units’ apart.

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Re: If P, Q and R are points on the number line, what is the distance betw  [#permalink]

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24 Sep 2018, 11:57
Bunuel wrote:
If P, Q and R are points on the number line, what is the distance between Q and R?

(1) The points P and Q are 20 units’ apart.
(2) The points P and R are 25 units’ apart.

Statement 1: No nothing about R.
INSUFFICIENT

Statement 2: No nothing about Q
INSUFFICIENT

Statement 1 & 2) Goal is to see if you can prove insufficiency. To do this you just need to come up with two examples where Q & R are different distances from each other.

Example 1: P = 0, Q = 20, R = 25. ----> Q & R are 5 units apart

Example 2: P = 0, Q = 20, R = -25 ----> Q & R are 45 units apart.

INSUFFICIENT

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Re: If P, Q and R are points on the number line, what is the distance betw   [#permalink] 24 Sep 2018, 11:57
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