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Question
A number is divisible by 5 and 6. It may not be divisible by ______.
Options
10
15
30
60
Solution
A number is divisible by 5 and 6. It may not be divisible by 60.
Explanation:
a = 5 × 6 × b
= 30 × b
It can’t be written as 60 × b and hence it may not divisible by 60.
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