# Buffet

In the school buffet were 30 children. 21 children bought sandwiches and 15 children bought lemonade. Four children did not buy anything. How many children bought lemonade and sandwiche?

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this example are needed these knowledge from mathematics:

## Next similar examples:

- The school

The school has 268 boys. Girls are 60 more than boys. How many children are there at school? - Snacks

The school attends 344 pupils. Half of them take snacks. 13 pupils who took snacks did not attend school. How many snacks left? - School marks

Boris has a total of 22 marks. Ones have 3 times less than threes. There are two twos. How many has ones and threes? - Bus 2

On the 6-th stop 44 passengers take off from bus. Overall, the 6-th stop 13 passengers were added. How many passengers take on 6-th stop? - Toy store

In the toy department of store was exposed 28 dolls. 19 dolls were blondes or could speak. 12 dolls were blondes, 14 could speak. How many blondes could speak in the toy department? How many blondes could not speak? - Bus

On the 4-th stop take on 56 and take off 38 passengers. How many were added (write as positive number) or shrunk (write as negative number) the count of passengers? - Skiing

Ski gondola starts at a distance of 975 m from the top and is 389 meters long. I went to the bottom station to the top station. How many meters I must go to the top of hill? - Euro

I have 1 euro. How much will I have when you spend it on? - Water colors

Painting workshop attend 10 students. Eight students painted water colors and nine painted with tempera colors. How many students painted water colors and tempera at the same time? - Car factory

A workshop had produced 25 cars. While they produced about 15 fewer than they had planned. How many cars they produced in the hall yet? How many cars are still to manufacture? - Car parking

The car park has 45 motorcycles and 25 cars. 14 cars went away and 2 arrived, then departs 12 motorcycles and 2 arrive. How many motorbikes and cars there are now? - Identity

123456789 = 100 Use only three plus or minus characters to correct previous identity/equation. - Tulips and daffodils

Farm cultivated tulips and 211 units on 50 units more daffodils. How many spring flowers grown together? - Three numbers

How much we increases the sum of three numbers when the first enlarge by 14, second by 15 and third by 16? Choose any three two-digit numbers and prove results. - Car parking

The car park has 80 cars when 53 cars leaves. How many car are there? - Mom and dad

Mom wants talk with dad 3 hours. But dad wants of 2 times more hours than mom ... How many hours wants dad talk with mom? ... - Postal stamps

Jano and Peter exchanged postal stamps. Jano gave Peter 32 stamps of the missile for 8 stamps with turtles. How good was Jano after this exchange (how many he has surplus in exchanged stamps)?