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March 18, 2010

Earth

It is estimated that the earth weighs 6 sextillion tons. How much more would the earth weigh if 1 sextillion tons of concrete and stone were […]
March 18, 2010

Weights

There are ten bags, each containing ten weights, all of which look identical. In nine of the bags each weight is 16 ounces, but in one […]
March 18, 2010

Frog

A frog fell into a well thirty-two feet deep. Each day he jumped two feet up the wall and slid back down one foot each night. […]
March 18, 2010

Coins

Which would be worth more, a pound of $10 pure gold coins or half a pound of $20 pure gold coins; or would they be worth […]