Erasmus+ CLIL Math Riddles

Mikołaj’s riddle: Chris has his eyes covered. In front of the boy in the basket there are 7 red apples and 13 green apples. What minimum number of apples must Chris take to make sure that two of them are the same colour?

• minimum 3 of apples.

• minimum of 6 apples

• minimum of 4 apples

• minimum of 2 apples

Krzysztof's riddle: Which of the actions is first: multiplication or division?

• multiplication

• division

Kinga’s riddle: How many times can you subtract 5 from 25?

• five times

• twenty times

• once

• twice

Amanda's riddle: The sum of three numbers is 42. The difference between the two smallest is 6, and their sum is 4/3 of the largest number. What three numbers meet these conditions?

• 9, 15, 18

• 10, 12, 20

• 7, 17, 18

• 9, 14, 19

Tymon ’s riddle: How many nines are there between 1 and 100?

• 11

• 12

• 18

• 20

Weronika’s riddle: At work, Max is to write numbers on houses on Flower Street. He has to prepare numbers from 1 to 100. How many times will he write the number 8?

• twelve times

• eleven times

• twenty times

• sixteen times

Kacper’s riddle: Take two numbers, such that the square of the first, plus the square of the second, shall equal 8; while the first, plus the product of the first and second, shall equal 6. What are the two numbers?

• 2 and 3

• 3 and 4

• 2 and 2

• 3 and 3

Igor’s riddle: Janusz found 20 pounds, but he has 30 now. How?

• A minute later he borrowed 10 pounds from a friend.

• He is a magician and turned twenty pounds into thirty pounds.

• He already had £10.

Adam's riddle: What is heavier: a kilogram of feathers or a kilogram of apples?

• a kilo of feathers

• a kilo of apples

• both weigh the same

Szymon's riddle: Antek has 119 zlotys, Wiktor has 67 zlotys less than Antek, and Szymon has 5 times more than Wiktor.

How much money do boys have together?

• 312

• 171

• 431

• 454