This technique will help you find how much money a person has in his wallet/pocket etc. It can be tried on a group of people simultaneously.
How to predict how much money a person has in his pocket
(a) Ask him to take the amount he has in his pocket (just the rupees, ignore the paisa)
(b) Next ask him to add 5 to it (C) Multiply the answer by 5 (d) Double the answer so obtained
(e) Finally, ask him to add his favorite one-digit number (any number from 0 to 9)
(f) Add 10
After the steps are over ask them to tell you the final answer. And just by listening to the final answer, you will come to know the amount he has in his pocket!
• Ignore the digit in the unit’s place.
• From the remaining number, subtract 6 and you will come to know the amount he has in this pocket.
Let us suppose a person has 20 Rupees in his pocket. He would work out the steps as given below:
(a) Take the amount in your pocket of 20
(b) Add 5 25
(c) Multiply by 5: 125
(d) Double the answer: 250
(e) Add your favourite single-digit number (say, 7) 257 (f) Add 1 267
Thus his final answer would have been 267. Now let us see how we can find out the amount he has from the final answer. As mentioned earlier, we will ignore the digit in the unit’s place (in this case it is 7). Now the remaining number is 26. From 26, we subtract 6 to get 20. Thus our answer is confirmed. Similarly, if the total was 1062, 63, and 170 the amount would be 100, 0, and 11 respectively.
(From 1062, we ignore the last digit 2 and take only 106. From 106, we subtract 6 and get the answer as 100 and so on…)
I use this technique in my seminars to give the audience some relief from complex calculations. There are many ways by which we can predict the amount a person has in his pocket but I prefer this technique because it neither involves any complex calculations nor is it too obvious for the audience to guess the secret.