Reason - examples
- Pets in ZOO
The zoo have run for pets. They are chickens, pigs and cow. Altogether there has 20 heads and 60 feet. How many chickens and piglets are there?
Student makes a mathematical task for five minutes and the task from biology in twelve minutes. Another day he have homework in math and biology which consists of eleven tasks together. To do the job took hour and a half. How many tasks maked in each subje
- Three cats
If three cats eat three mice in three minutes, after which time 270 cats eat 270 mice?
What is better for people (employees)? ?
The parents had 2 daughters. Each of them had one brother. How many members family had?
One brick is 2 kg and half a brick heavy. What is the weight of one brick?
The root of the equation ? is: ?
Route is long 203 km and the first day first regiment went at an average speed 20 km/h and journey back 19 km/h. The second day went second regiment same route at an average speed 18 km/h there and back. Which regiment will take route longer?
4 chickens give 4 eggs in 4 days. How many eggs can give 8 chickens for 8 days?
- It is rectangular?
Size of two of the angles in a triangle are: α=60°, β=20°. Is it a right triangle?
How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)?
How many times you can subtract the number 5 from the number 67?
- School trip
School trip cost 340.8 USD for one class (24 students). How much would cost a trip for two classes? (both classes together have 44 students)
Increasing the minimum wage while maintaining the other parameters of the system, unemployment will be:
- Stock market
Simon one day decided to invest € 48000 to the stock market. After six months he invested July 11 stock markets fell by 43%. Fortunately for Simon from July 11 5 to October 11 his shares have risen by 13%. Simon is then: ?
In human body the blood is about 7.7% body weight. How many kilograms of blood is in the human body with weight 96 kg?
In the box are 12 candies that look the same. Three of them are filled with nougat, five by nuts, four by cream. At least how many candies must Ivan choose to satisfy itself that the selection of two with the same filling? ?
A man drinks a barrel of water for 31 days, woman for 58 days, for how many days they drink barrel together?
Andrew wrote this series of numbers: 1,3,7,15, .... n. Which number in the series does not belong? ?
In the hutch are 48 mottled rabbits. Brown are 23 less than mottled and white are 8-times less than mottled. How many rabbits are in the hutch?