State the necessary condition for following statement to be true 'Two times a number is a even number'
A
number should be fraction
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B
number should be irrational number
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C
number should be whole number
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D
number should be negative fraction
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Solution
The correct option is C number should be whole number Two times a number is a even number,if a number is whole number X is number which belongs to whole number, then 2X will always be even number