If a number is entered as input and it is then added with 2 followed by multiplication with 2, the output of 16 is observed. What is the number?

5

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6

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7

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8

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Solution

The correct option is B $6$
If after multiplication by $2$ , the output is $16$
To find the number we proceed with the opposite of multiplication i.e. division.
So dividing the number $16$ by $2$ , we get $8$

Now, $8$ is obtained when input number is added with $2$ .
To find the input number we proceed with opposite of addition i.e. substraction.

So, input number is $8 - 2 = 6$

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