Dennis ties his dog 1 meter from a corner of a 7-meter by 5-meter hut as shown in the picture. He uses an 11-meter-long leash. Dennis places 5 treats as shown. How many of the treats can the dog reach?

Six strips are woven into a pattern as shown below. What does the pattern look like from the back?

Tom cuts two kinds of shapes out of grid paper as shown below. What is the smallest number of shapes that Tom needs in order to exactly cover the boat in the picture?

Lonneke builds a fence using 1-meter-long poles. The second picture shows a 4-meter-long fence. How many poles does Lonneke need to build a 10-meter-long fence?

The weight of a toy dog is a whole number. How much does one toy dog weigh?

The colors in the top picture are switched. Then the picture is rotated. What does the picture look like now?

Every time the kangaroo goes up 7 steps, the rabbit goes down 3 steps. On which step do they meet?

Sara has 16 blue marbles. She can trade marbles in two ways: 3 blue marbles for 1 red marble, and 2 red marbles for 5 green marbles. What is the maximum number of green marbles she can get?

Peta Rabbit has 20 carrots. She eats 2 carrots every day. She ate the 12th carrot on Wednesday. On which day did she start eating the carrots?

The sum of three numbers is 50. Karin subtracts a secret number from each of these three numbers. She gets 24, 13, and 7 as the results. Which of the following is one of the original three numbers?

Steven wants to write each of the digits 2, 0, 1, and 9 in one of the boxes shown below to make a sum. He wants to get the largest possible answer. Which digit can he write instead of the question mark?