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Question

Which of the following is a variable?


A

5

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B

a

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C

135

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D

π

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Solution

The correct option is B

a


5 is an integer, which has a fixed value. It cannot be used as a variable.

a can be used as a variable.

135 also has a fixed value, which cannot be used as a variable.

π is a constant that has a fixed value of 227. Hence it cannot be used as a variable.


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