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Question

Which of the following numbers are not divisible by 3?
42,73,84,105,314

A
42
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B
73
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C
84
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D
314
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Solution

The correct options are
B 73
D 314
We use a rule to check whether the number is divisible by 3 or not.
A number is divisible by 3 if the sum of the digits is evenly divisible by 3.
A. 4+2=6, divisible by 3
B. 7+3=10, not divisible by 3
C. 8+4=12, divisible by 3
D. 3+1+4=8, not divisible by 3.


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