A friend of mine asked me to write down any multidigit
number, But , he put a condition, the number should not end with a zero.
I put down the number 96452
Then he asked me to ad up the five digits and subtract the
total from the original number,
I did and here is what I got:
96452 -26 = 96426
He then asked me to cross out any one of the five digits and
tell him the remaining numbers. I crossed out the 2 and told him the rest of
the digits. I neither told him the original number nor what I had done with it.
Yet ‘pop’ he told me the exact number I had crossed out.
How do you explain
it?
Answer: very
simple. All you have to do is to find the digit which added to the two you will
get nearest divisible by 9.For example in 639, I crossed out the 3, and I told
him the other two 6 and 9. All he had to do was add them and get 15. The
nearest number divisible by 9 is 18. Therefore the missing number is 3.
