Which two rules look at the last digit alone?
A3 and 9
B4 and 12
C2 and 6
D5 and 10
Answer & Solution
Correct answer: D. 5 and 10
1. One passes on a 5 or a 0.
2. The other passes only on a 0.
3. They are the rules for 5 and 10.
_Source: OpenStax, Contemporary Mathematics, Ch 3 'Real Number Systems and Number Theory'_
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