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Question
Which of the following is a variable?
Options:
A .  Number of days in a week
B .  5
C .  Temperature of a place in a day at different times
D .  Number of months in a year
Answer: Option C
:
C
The temperature of a place in a day at different times will be different. So it is a variable.
The number of days in a week and the number of months in a year always remain the same. So these are constants.
5 has a fixed value. So it is a constant.

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