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1 mark

Choose the odd number out of the given options.

  1. A
    151
  2. B
    163
  3. C
    157
  4. D
    161

Solution & Step-by-step Explanation

Let us check the nature of each number:
151 is a prime number.

163 is a prime number.

157 is a prime number.

161 is a composite number because it is divisible by 7 and 23 (161=7×23).

Since 161 is the only composite number among the choices, it is the odd one out.

Practice this question

Try it yourself before checking the explanation above.

Choose the odd number out of the given options.
A
151
B
163
C
157
D
161

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Number ClassificationOdd One OutPrime Numbers

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