1, 000 – (12 + 23 + 34 + 45 + 55 + 66 + 77 + 88) = ?

One kg of dried mushrooms is derived from 12 kg of fresh mushrooms. How many kg of fresh mushrooms would you need to get 6 kg of dried mushrooms?

Two ants are moving towards each other. One of them travelled a distance of 176 cm, and the other travelled 80 mm more than the first. What is the length that both ants travelled in total?

A) 36 dm B) 260 cm C) 402 mm

The product of 4 natural numbers is 72. The sum of these numbers is 15 and neither of them is 2. Which is the greatest among these numbers?

We have 5 identical chocolate bars, each consisting of 28 pieces. We have to divide them equally between 7 children. What is the minimum number of times we need to break each chocolate bar in order to do this?

The sum of the three-digit numbers , and ̅̅̅̅̅ is 1010. (A, B and C represent missing numbers). In this case, what is the three-digit number ?

A book has been numbered as follows: the first pair of pages has been numbered as 1 and 2; the second pair as 3 and 4, and so on, until the last pair of pages, which has been numbered as 127 and 128. If I open the book at a random place, what is a possible product of the numbers of the two pages that I’ve opened the book at?

In the same room we have 2 grandmothers, 4 mothers, 4 daughters, 2 granddaughters. What is the smallest number of people that there could be in the room?

How many digits are used to write down the first 100 odd numbers?

Four children met together: Adam, Bobby, Charley and Daniel. Adam shook hands with 3 of these children, Bobby shook hands with 2, and Charley shook hands with 1. How many of the children’s hands did David shake?

I solve 6 problems a day, and my brother solves three times less. Together we solved 72 problems. How many days did it take us to do this?

The product of a few different one-digit numbers is a number that has a 5 in the ones place. How many even numbers are there among the multipliers?

Between each two neighbouring digits of the number 2016, I placed either 2 addition signs and 1 multiplication sign, or 2 multiplication signs and 1 addition sign.

Example: 2 + 0 + 1 ´ 6 or 2 ´ 0 ´ 1 + 6

Annie has a magical necklace. Each bead of the necklace is numbered (1, 2, 3, 4 and so on). If between the beads numbered as 5 and 15 there is the same number of beads, what is the total number of beads on Annie’s necklace?

In Rose’s garden there are 232 roses which are not in bloom yet and 168 which are blooming. Every day 4 new roses bloom and the ones that are already blooming do not fade. How many days will it take for the blossoming and non-blossoming roses to be an equal number?

A vessel, when full of water, weighs 20 kg, and when half full it weighs as much as 3 empty vessels. How many kilograms does this vessel weigh when it is empty?

A

square has a side length of 1 cm. On each of its sides (on the

outside) has been built another square with a side length of 1 cm.

After that, on each of the sides of the new figure, another square with a

side length of 1 cm has been built. How many cm is the

perimeter of the final figure?

What

is the maximum possible number of different odd three-digit numbers that we

can add and receive a three-digit number as a result?

The expression we are going to use for this problem is

6 ¸ 2 + 4 ´ 3 – 1 ´ 10

Exchange one of the numbers from the expression with such a number that the initial value of the expression would be increased by 1. How many of the numbers can be changed?