Brain-building Puzzles and Teasers for kids

Mr. Jones is 28 years older than his son. In 11 years, he will be 3 times as old as his son. How old is each person now?HintUsing algebra will be the easiest way to solve this. Answer3(x + 11) = x + 28 + 11Mr. Jones: 31; son: 3

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 mph. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start travelling. The pigeon flies back and forth at

Ten students sit for an exam which has a maximum score of 100. The average of the 10 scores was 92. What are the minimum marks a student could have scored? Answer20 (20+9×100=920 divided by 10=92)

Mad Ade went into his local corner shop to buy a chocolate bar. He paid 50 pence for the bar, and to his delight and astonishment, got back four times the change to which he was entitled. He noted that this was equivalent to twice the amount he had given the shopkeeper. What was Mad

Each key fits only one lock. There are ten locks and their keys in some order. How many times, in the worst case, do you have to try to match each lock with each key?HintIt’s not 55. AnswerTo determine the first lock you, need 9 tries. If none of them fits, then the last key

Suppose these lines were some matches. Move just one match to make the following equation correct.I + II + III = IIIIa) What’s after ” = ” cannot be changed.b) Move only ONE match. AnswerTake a match from “II”, put it on the middle of “III” and you’ll have I + I + I +

POSTER PRICES:12″ x 18″ posters cost $724″ x 36″ posters cost $941″ x 20″ posters cost $11The Poster Kingdom is offering a special sale on their posters: “Buy two posters, and take a dollar off one of the posters.” Kathy, Lauren, Joe, Travis and Shirley each bought two posters and spent a total of $85.Shirley

Fred and Bob are sitting around, shooting the mathematical breeze, when they decide to play a game of “Guess the Number”.Fred tells Bob that he is thinking of a number between 13 and 1313.Bob asks Fred if the number is below 500. Fred says, “Yes.”Bob asks Fred if the number is a perfect square. Fred

Ranger Cadet Bu Star has just been given the task of moving the five cases of Park Pop soda at the Weiss Pavilion to the Wirth Pavilion, which is 5 miles away. For transport, Bu must use a MoJoPed, a moped which runs on Park Pop. It can carry, at most, its rider and 25

A man is biking on a 40-mile trip. He travels the first half of the trip at a speed of 15 miles per hour. If he wants his average speed to be 20 miles per hour, at what speed should he travel during the second half? Answer30 miles per hour.Step 1: If he wants an

Alyssa, Juan, Myisha, Tracy and Scott raised a total of $550.68 for the nearby homeless shelter by walking in a “walk-a-thon”. Before the walk, they each got promises (pledges) from a number of people to contribute money for each mile they walked. The total amount per mile which each person raised ranged from $7.10 a

If you’re paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at once? AnswerTwo friends to a movie at once. You’re only paying for three tickets but if you were to take one friend to a movie twice you would be paying for 4 tickets. Don’t

Father A is twice the difference in years of the ages of Father B and Son A, who is one and a half times the age of Son B.Father B is currently twice the age Son A is going to be when Son B will be double the age he is now.All of the ages

A ship is twice as old as its boiler when the ship was as old as the boiler is now.The sum of their ages is 21.How old is the boiler, and how old is the ship?HintOnce you get your head around the wording, I think it’s easy enough. Try and write down the equations for

In the fictional, the rat-infested village of Cattatackya (where cats live) last month, each cat killed the same number of rats as every other cat. The total number of rat fatalities (deaths) during the month came to a total of 2117.Less than 50 cats achieved this remarkable number of rat killings. How many cats were