For how many different pairs of unequal positive integers less than 10 is the least common multiple of the numbers less than their product?
A.
6
B.
7
C.
8
D.
9
Exam No：2018 First Round Grade 5 Year：2018 Question No：25
Answer:
D
Knowledge points:
G5 - Data - Systematic Listing & Combinations
Solution:
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