Question

think of a number .double it.add 18.take away 10,halve it.take away 4.now what do you get and why?

Answer 1

i get the number which I thought and this is why because it is a mathematical trick

Answer 2

The steps are as followed:
2*x =2x____step 1
2x+18_____step 2
2x+18-10____step 3
2x+8=2(x+4)____step 4
2(x+4)/2____step 5
x+4-4______step 6
which gives the number we thought of.