Five Zeros

Age of father and son

The ages of a father and son add up to 66. The father’s age is the son’s age reversed. How old could they be? (3 possible solutions).

Train Journey

Mr. Grumper grumbles about bad time-keeping trains like everybody else. On one particular morning he was justified, though. The train left on time for the one hour journey and it...

Crushed fly

Two trains 200 miles apart are moving toward each other; each one is going at a speed of 50 miles per hour. A fly starting on the front end of...

Which weighs more?

Which one weighs more a pound of feathers or a pound of bricks?

One Through Nine

How can you make 100 using the numbers 1 to 9 only once each?