Friday, 2 October 2009

DAY 152
The Pupils of Pythagoras:
Q. Tell us, illustrious Pythagoras, how many pupils frequent they school?
A. 1/2 study math, 1/4 natural philosophy, 1/7 observe silence, and there are 3 girls besides.

Answer:

28..........1/2 X + 1/4 X + 1/7 X + 3 = X

DAY 153
If you add the digits 1 through 9, the answer is 45. By changing just one of the plus signs to a multiplication sign and adding a single pair of parentheses, the sum is now 100. What is the change?

Answer:

Put parentheses around the 8 and 9 and multiply them.
(28 + 72 = 100)

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