How many numbers between 10 and 31 ( including 31 ) can be written using only the digits 1, 2 and 3 ? You can repeat digits.

My rabbit eats only cabbage and carrots. Last week he ate either 10 carrots or 2 heads of cabbage each day. If he ate a total of 6 heads of cabbage last week, how many carrots did he eat ?

Mary has 12 flowers, five of which are roses. The rest are tulips. Six of the flowers are white, and the remaining flowers are red. At least how many tulips are red ?

Six little elephants, A, B, C, D, E, F, are lining up to buy tickets. F is after A and before D and he is also between B and C; B is the first in the line; and E is the last in the line. Which elephant is F ?

A square was cut into four parts as shown in the picture.

 Which of the following shapes cannot be made with these 4 parts ? 

Place the digits 2, 3, 4 and 5 in the squares so that the sum is as large as possible. What is this sum ?

Fedya has 4 red cubes, 3 blue cubes, 2 green cubes, and 1 yellow cube. He is building a tower ( see the picture ) in such a way that no two cubes touching each other have the same colour. What is the colour of the cube with the question mark ?

Gear A is about to make one complete turn in the direction shown in Figure 1

The piece “x” moved to one of the positions a, b, c, d, e shown in Figure 2

To which position did “x” move ?

How many triangles are there in the picture ?

John wrote the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 on a whiteboard. John then erased some of the numbers and added up the remaining ones. He got a sum of 24. At most how many numbers were left on the whiteboard ?

Which digits are missing ?

There are twelve books on a shelf and four children in a room. How many books will be left on the shelf if each child takes one book ?

Which of the dresses has less than seven dots, but more than five dots ?

A lot of babies were born in the zoo last year: two baby lions, three baby dolphins and four baby eagles. How many legs do all these babies have altogether ?

Several students want to plant 20 tulips in the school garden. It takes ten minutes for them to plant five tulips. They started at 9:00 in the morning. At what time will they finish planting all 20 tulips ?