Answer to #60:

Your answer is correct, JaneFairfax! Very good!
Buth there's a minor mistake in how you arrived at the answer.

#63. A block of wood in the form of a cuboid 4" × 9" × 11" has all its six faces painted pink. If the wooden block is cut into 396 cubes of 1" × 1" × 1", how many of these would have pink paint on them?

Solution to #59:
You ought to be correct, JaneFairfax and John E Franklin!
But I had the series of side total of a magic square, commencing with a 3x3 magic square using number 1-9, in my mind!

Solution to #63:
Well done, mathsyperson!

Last edited by John E. Franklin (2008-05-25 08:28:32)

#65. Roland, Marc and Pierrette are three children in the same family.
Pierrette is three times Marc's age. In two years, she will be twice the age Roland will have at that time. Roland is a year older than Marc.
How old are the children?

#66. A person can carry sufficient food and water to travel four days in the desert. The planned trip will last six days. Alone, no one can succeed.
How many persons will it take to lead the first person to her destination and to allow the others to return to the starting point?

#68. If five persons can sew five dresses in five days,
how many persons can sew fifty dresses in fifty days?

#69. Monique is 24 years old. She is twice the age that Valerie was when Monique was the same age that Valerie is now. How old is Valerie?

Answer to #68:
JaneFairfax, would you like another opportunity?