## Saturday, 10 November 2012

### MATHS MAGIC

 HARIKRISHNA IX-B

Sneak some spelling into this math problem.
1.  Select any number. Write it out as a word; six hundred and six.
2.  Count the letters (but don’t count spaces or the hyphen); 13.
3.  Write down the number of letters as a word; thirteen.
4.  Count the letters in that word; 8.
Count the letters of that word; eight. The answer will always work down to “4.” So, 5 (letters in eight), five, 4!
Do this trick on a calculator with a 10-digit display or work it out on paper.
1.  Choose any number 1 through 9; 8.
2.  Multiply that number by the magic number – 123,456,789; 8 x 123456789 = 98,765,432
3.  Multiply the answer by 9; 98,765,432 x 9 = 8,888,888,808.
4.  The answer will be a 10-digit number, with nine of the digits the same as the number chosen in step 1.

The answer here will always work out to 1.
1.  Ask another person to choose a number from 1 to 10 without revealing this number; 3.
2.  Have them double the number; 3 + 3 = 6.
3.  Add 2 to the result; 6 + 2 = 8.
4.  Divide that number by 2; 8 divided by 2 = 4.
5.  Subtract the original number from the answer in step 4; 4 – 3 = 1.
6.  The answer is always 1.

It seems like magic that the answer always works out to 9.
1.  Enter into a calculator any number that consists solely of the number nine repeated; 9,999.
2.  Multiply it by any number; 9,999 x 25 = 249,975.
3.  Write down the number on paper.
4.  Add the individual digits in the answer; 2 + 4 + 9 + 9 + 7 + 5 = 36
5.  Add the answer digits together. If the answer isn’t 9, repeat adding the new answer digits until the result is 9