#### Number of problems found: 1299

• Painters
15 painters painted fence for 280 minutes. For how many minutes paint half of this fence 12 painters?
Two fifth-graders teams competing in math competitions - in Mathematical Olympiad and Pytagoriade. Of the 33 students competed in at least one of the contest 22 students. Students who competed only in Pytagoriade was twice more than those who just compete
• Pizza master
Master says that he can splits pizza to 16 parts by five equals straight cuts. Is it possible?
• Number
I think the number. If I add to its third seven I get same as when to its quarter add 8. Which is the number?
• Log
Worker cut his thick log to 6 pieces for 30 min. How long he cut log to 12 pieces?
• The pot
The pot is in 1/3 filled with water. Bottom of the pot has an area of ​​329 cm2. How many centimeters rises water level in the pot after add 1.2 liters of water?
• Potatoes
Could 446 tons of potatoes (ρ = 771 kg/m³) fits in a warehouse with a volume of 699 m³ ?
• Hostel
Students are accommodated in 22 rooms. Rooms were 4 and 6 bed. How many rooms in which type occupied 106 children there?
• Playing Cards
Kara has 2 times more cards than Dana, Dana has 4× less than Mary. Together they have 728 cards. How many cards has each of them?
• After 16 years
After 16 years will Dana be five times older as she was four years ago. After how many years will Dana celebrate her 16th birthday?
• Line
How many parts of line divide 5 (different) points that lie on it?
• Trees
3/5 trees are apples, cherries are 1/3. 5 trees are pear. How many is the total number of trees?
• Wood planks
1 m3 of wood planks costs 179 EUR. How much will I pay for 11 planks measuring 6 cm, 10 cm and 6 m?
• 6-gon
Perimeter of regular hexagon is 113. Calculate its circumradius (radius of circumscribed circle).
• With bracket
Calculate (evaluate) simple mathematical expression with a negative numbers and a bracket: 13+15*5-2*(-6)
• Similarity
Are two right triangles similar to each other if the first one has a acute angle 70° and second one has acute angle 20°?
• Sales off
Calculate what was the original price of the good, if the price after discount 25% and the subsequent rise of 20% is 400 USD.
• Cast brass
Brass cast weight was 3.84 kg, it had turned into piston weight 3.491 kg. How many grams of brass was turned off?
• Buses
At the bus stop is at 10 o'clock met buses No. 2 and No. 9. Bus number 2 runs at an interval of 4 minutes and the bus number 9 at intervals of 9 minutes. How many times the bus meet to 18:00 local time?
• Digits of age
The product of the digits of Andrew age as 6 years ago and not equal to 0. Andrew age is also the smallest possible age with this two conditions. After how many years will be the product of the digits of Andrew age again the same as today?

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