# Examples for 5th grade (the fifth graders)

- If-then equation

If 5x - 17 = -x + 7, then x = - Brick

One brick is 2 kg and half a brick heavy. What is the weight of one brick? - Chocolate

Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates? - Three cats

If three cats eat three mice in three minutes, after which time 210 cats eat 210 mice? - Divisibility

Is the number 109433 divisible by 7? - Cyclist

A cyclist passes 88 km in 4 hours. How many kilometers he pass in 8 hours? - Monkey

Monkey fell in 31 m deep well. Every day her scramble 3 meters, at night dropped back by 2 m. On that day it gets hangover from the well? - Diophantus

We know little about this Greek mathematician from Alexandria, except that he lived around 3rd century A.D. Thanks to an admirer of his, who described his life by means of an algebraic riddle, we know at least something about his life. Diophantus's youth l - Chickens

4 chickens give 4 eggs in 4 days. How many eggs can give 8 chickens for 8 days? - Medicament

Same type of medicament produces a number of manufacturers in a variety of packages with different content of active substance. Pack 1: includes 60 pills of 1200 mg of active substance per pack cost 18 Eur. Pack 2: includes 30 pills of 1000 mg of active s - Homeless Dezider

Homeless Dežko has 13 coins in jacket: Calculate the value of its assets and calculate how many bottles of wine for 0.55 EUR can he buy. - Tereza

The cube has area of base 64 mm^{2.}Calculate the edge length, volume and area of its surface. - Textbooks

After check of textbooks found that every 8-th textbook should be withdrawn. Together 74 textbooks were withdrawn. How many textbooks were in stock before withdrawn and how many after withdrawn? - Youth track

Youth track from Hronská Dúbrava to Banská Štiavnica which announced cancellation attracted considerable media attention and public opposition, has cost 6.3 euro per capita and revenue 13 cents per capita. Calculate size of subsidies to trip group of 17. - It is rectangular?

Size of two of the angles in a triangle are: α=60°, β=20°. Is it a right triangle? - 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) - Subtraction

How many times you can subtract the number 5 from the number 67? - Holidays

Calculate how many hours take holidays, if take 1 weeks. - Two squares

Two squares whose sides are in the ratio 4:3 have sum of its perimeters 103 cm. Calculate the sum of area this two squares. - Cats

Two cats caught two mice in two days. How many mouses will catch 6 cats for 6 days?

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