Find your friend’s age without being told!
You can find out the age of your friend without being told by asking him to play a simple mathematical game and ask him to carry out the following instructions in the given order.
- Write down your age
- Add 5 to it.
- Double the result.
- Add 10 to it.
- Multiply theresult by 5.
- Subtract 100 from it.
Get the final result from your friend and cross out the last digit to obtain your friend’s age. Try this mathematical game with different people.
I got found this trick in a Mathematics book of Grade 8 :P