April 15, 2013

Algebra: x + 1/y = 1.5 and y + 1/x = 3. What is x/y?

From NCTM

Answer available April 22, next puzzle

Answer to math puzzle of April 8

Algebra: If 1 1/2 woodchucks can chuck 1 1/3 cords of wood in 1 1/4 hrs, how much wood can a woodchuck chuck in 1 hour?

From NCTM

Solution: 3 woodchucks can chuck 32/3 cords of wood in 5 hours (multiply woodchucks by 2 and hours by 4 to get 8 times the production). Now divide by 15 to get 1 woodchuck and 1 hour for 32/45 cords of wood.

©copyright 2013, Louis Bookbinder - booky1@earthlink.net

updated 15 April 2013

From NCTM

Answer available April 22, next puzzle

Answer to math puzzle of April 8

Algebra: If 1 1/2 woodchucks can chuck 1 1/3 cords of wood in 1 1/4 hrs, how much wood can a woodchuck chuck in 1 hour?

From NCTM

Solution: 3 woodchucks can chuck 32/3 cords of wood in 5 hours (multiply woodchucks by 2 and hours by 4 to get 8 times the production). Now divide by 15 to get 1 woodchuck and 1 hour for 32/45 cords of wood.

updated 15 April 2013