Fun with mathematics

a) Think of a whole number between 1 and 10.

b) Double it.

c) Add 4 to your result.

d) Divide the result by 2.

e) From this result, subtract the initial number you had thought of.

f) Your result is 2.

Another exercise

a) Think of a whole number between 1 and 10.

b) Multiply it by 3.

c) Add 30 to your result.

d) Multiply this result by 2.

e) Divide the entire result by 3.

f) Subtract 10 from your result.

g) Divide this result by 2.

h) From this result, subtract the initial number you had thought of.

i) Your result is 5.