Free Practice Question
PS · Problem Solving
605-655
Number Properties
If P is the sum of all the positive odd integers less than 50 and Q is the sum of all positive even integers less than 50, then P - Q =
Answer Choices
Correct answer marked belowA
-24
B
0
C
1
25
Correct
E
50
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Explanation
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Sign in to commentWhat this question tests
What it tests
Your command of divisibility, primes, factors, parity, and how the GMAT tests properties of integers.
Common trap
Forgetting that 1 is not prime, that 0 is divisible by every integer, or that negative numbers flip your assumptions.
Details
Difficulty
605-655
Type
PS
Category