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Question

# Which of the following natural numbers are composite?

A
233
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B
788
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C
169
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D
121
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Solution

## The correct option is D 121All the natural numbers having factors other than 1 and itself the number are composite numbers. Also, all the even numbers except 2 are composite because they always have 2 as their factor. 2 is the only even prime number. 788 is even. Hence, it is a composite number. 169=13×13, 13 is factor of 169. Hence, it is a composite number. similarly, 121 is divisible by 11. Hence, 121 is a composite number. 233 do not have factor other than 1 and itself. Hence it is a prime number not composite number.

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