Which pair of rules is combined to test for 6?
A4 and 9
B2 and 3
C3 and 4
D2 and 5
Answer & Solution
Correct answer: B. 2 and 3
1. Six is two times three.
2. Each factor brings its own rule.
3. The pair is 2 and 3.
_Source: OpenStax, Contemporary Mathematics, Ch 3 'Real Number Systems and Number Theory'_
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