Free Practice Question
PS · Problem Solving
655-705
Divisibility/Multiples/Factors
Identify the second smallest positive integer that can be evenly divided by all positive integers less than 8. What is the sum of its digits?
Answer Choices
Correct answer marked belowA
4
B
5
C
7
D
10
12
Correct
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Explanation
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Official Explanation
Official
To solve this, we first calculate the LCM of: 2, 3, 4, 5, 6, 7. The LCM is 420. The first multiple of the LCM is…
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What it tests
Your understanding of divisibility rules, least common multiples, and greatest common factors.
Common trap
Forgetting that 1 is not prime and that every integer divides 0.
Details
Difficulty
655-705
Type
PS
Category