For example, he could pick 481. He might need a simple calculator as well.
For example, 481 backwards is 184.
481 - 184 = 297.
In our example, 297 has three digits, so you can skip this step. Sometimes your friend will end up at 99, and this step will turn that into “099. "
For example, the reverse of 297 is 792.
In our example, 792 + 297 = 1089.
The answer is always 1089. If your friend has a different answer, he did not follow instructions, or he made a mistake.
This trick won’t work on someone 100 years old or above, but that’s almost never a problem!
For example, if someone is 42 years old, she would write down 42 x 5 = 210. Let her use a calculator if she’d prefer to.
In our example, adding a zero to 210 makes 2100.
For example, if today is March 15th, the volunteer in our example would sum 2100 + 15 = 2115. Tell her to ignore the month and year.
2115 x 2 = 4230.
If her shoe size is 7, she’ll add 4230 + 7 = 4237.
For example, it’s March 15th in our example, so multiply 15 x 2 = 30 in your head. Say “Subtract 30 from your answer” and the volunteer will calculate 4237 - 30 = 4207.
