The Special Number

        There is a number whose double is greater than its half by 45.

       Can you find this number?

Answer:    As the difference between twice the number and half of it amounts to 45. Or half of the number plus the whole of its represented by I adds up to 45.

½+1 = ½ + ²⁄₂=³⁄₂ =45

Now we have to find what number 3/2 is equal of 45. To do this we invert ³⁄₂ to ⅔and multiply by 45. This gives us

⅔ X 45 =30

Therefore 30 is the number.