Question

Which number produces a rational number when multiplied by 0.5

Answer 1

10 is your answer because it is a terminating or repeating decimals

Answer 2

Every Rational number when multiply by 0.5 produces a rational number.

Explanation:

Rational Number is a number that can be changed in the formation of
`(p)/(q)`, where p & q are real numbers and q ≠ 0.

Even a natural number can also be a rational number since it can be change into
`(number)/(1)`

So, the every rational number when multiply by 0.5 produces a rational number. For example: 2 × 0.5 = 1 (rational number)

7 × 0.5 = 3.5 (rational number)

42.63 × 0.5 = 21.315 (rational number)

But,
`√(2)*0.5` = irrational as it has non terminating decimal number (also
`√(2)` is irrational number)