Question

Think of a number
add 7 to it
Multiply the result obtained by 2
Subtract 4
Find half of the result obtained
Subtract original number
Learner may tell the number obtained
Discuss the game by changing its rules and try to find how all of them get the same answer under given conditions​

Answer 1

Answer:

Think of a number. Add 7 to it. Subtract 2. Subtract your original number. Multiply by 4. Subtract 2. What number do you get?

Let the number thought be x

As per statement doing the functions now:

Add 7 to it, it will be x + 7

Subtract 2 it will be x

+ 7 – 2 = x + 5

After subtracting the original number it will be

x + 5 - x = 5

Now multiplying by 4 it will be 5 × 4 = 20

On substracting 2 the value will be 20 – 2 = 18

The final number obtained is 18.