If I put one canary per cage, I have one canary too many. If I put in two canaries per cage, I have one cage too many. How many canaries and cages do I have?

We have a 100 foot piece of ribbon. If it takes one second to cut it into a 1 foot strip how long would it take to cut the entire ribbon into one foot strips?

You have 12 black socks and 12 white socks in your drawer. What is the minimum number of socks that you have to take out to make sure that you have a matching pair?

I am ten years older than my sister. There was a time when I was three times older than she was, and in one year I will be twice as old as she is. What is my age now?

Suppose 8 monkeys take 8 minutes to eat 8 bananas. How many minutes would it take 3 monkeys to eat 3 bananas? How many monkeys would it take to eat 48 bananas in 48 minutes?

If I had one more sister I would have twice as many sisters as brothers. If I had one more brother I would have the same number of each. How many brothers and sisters have I?

If your sock drawer has 6 black socks, 4 brown socks, 8 white socks, and 2 tan socks, how many socks would you have to pull out in the dark to be sure you had a matching pair?

A bank customer had $100 in his account. He then made 6 withdrawals, totaling $100. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Only mental calculation allowed. Take 1000 and add 40 to it. Now add another 1000. Now add 30. Add another 1000. Now add 20. Now add another 1000. Now add 10. What is the total?

You have two jugs. One holds exactly 3 gallons and the other 5 gallons of water. You have unlimited supply of water. How do you fill 4 gallons of water into the five-gallon jug?

A car’s odometer shows 72927 miles, a palindromic number (a number that reads the same forward or reversed). What are the minimum miles you would need to travel to form another?

A pencil, an eraser, and a notebook together cost $1. A notebook costs more than 2 pencils. 3 pencils cost more than 4 erasers. 3 erasers cost more than a notebook. How much does each cost?

You have a rope that will reach around the earth (+/- 40,000 km). If you put sticks of 1 meter high around the world and lay the rope on these sticks, how much longer will the rope need to be?

I was given 100 questions to be solved. I scored 85. The score was calculated by subtracting twice the number of wrong answers from number of correct answers. How many questions did I solve correctly?

A nonstop train leaves Moscow for Leningrad at 60 miles per hour. Another nonstop train leaves Leningrad for Moscow at 40 miles an hour. How far apart are the trains 1 hour before they pass each other?