Free Practice Question
PS · Problem Solving
555-605
Number Properties
How many zeros does the integer 60! end with?
Answer Choices
Correct answer marked belowA
7
B
12
14
Correct
D
15
E
16
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Explanation
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Official Explanation
Official
To determine how many zeros are at the end of 60!, we need to find out how many pairs of (5*2) can be formed. Since there will be more 2's than 5's, we focus on counting the…
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Comments
2
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M
MohiniDec 9, 2024
thank you for sharing
A
AndrewOct 20, 2024
thanks
What 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
555-605
Type
PS
Category