Free Practice Question
PS · Problem Solving
705-805
Number Properties
What are the last two digits of 63*35*37*82*71*41?
Answer Choices
Correct answer marked belowA
10
B
30
C
40
70
Correct
E
80
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Explanation
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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
705-805
Type
PS
Category