March 23, 2015

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 23, 2015

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 […]
March 23, 2015

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 23, 2015

Horse

A man bought a horse for $60 and sold it for $70. Then he bought it back for $80 and sold it for $90. How much […]