Maths practice for 12-year-olds - page 110 of 355

Number of problems found: 7085

Salaries
The employer increased the salaries of its three employees by an average of 30 euros. One increased his salary by € 20, the other by € 45. How many euros did he raise the salary of a third employee?
Barrel water remainder
There are 1.5 hectoliters of rainwater in the barrel. Two-fifths of the water passed from the barrel while watering the garden. How many liters of water remained in the barrel?
Circumference - diamond
The diamond has an area of 21.6 cm square. Its height is 4 cm. What is the circumference of the diamond?
Create 2
Create word problems based on the given number sentence (300/24) - (207.60/24) = N.
Price discount
The original price of a pen is 9 1/5 dollars. Any purchase of 5 pens needs only 7/10 of the original price. How many dollars should be spent to buy five pens?
Resistor voltage current
A current of 5 mA flows through a resistor with an electrical resistance of 600 Ω. What electrical voltage do we measure between the resistor terminals?
Voltage - Kirchoff laws
At a voltage of 2.5V, a current I1= 20mA flows through the resistor. What will the voltage be at the resistor's ends when the current I2= 1,2A passes through it?
A bamboo
Bamboo is 26 2/5 meters long. If it is cut into 12 pieces, how long will each piece be?
Eva brigade earnings
Eva received money for a brigade. She saved three-fifths of the money, lent one-quarter to her sister, and bought a T-shirt for the remaining 180 CZK. How much CZK did Eva earn on the brigade?
Trapezoid angle construction
Sestroj trapezoid ABCD, if a = 8cm, b = 5cm, alpha = 60 °, beta = 75 °
Manganese
Manganese bronze contains the following metals per pound: copper 0.89 lb, tin 0.10 lb, and manganese 0.01 lb. How much copper is in a shaft that weighs 235 pounds?
Diamond angle construction
Construct an ABCD diamond with side a = 4.8cm, and the angle at vertex B is 60 °
Plot exchange area
Mr. Nový exchanged his rectangular plot of 5.2 hectares with his neighbor for two. The first plot has the shape of a square with a side of 70 m, and the second has the shape of a rectangle with dimensions of 110 m and 410 m. After the exchange, does the n
Two brothers
The two brothers have a total of 48 nuts. Two-thirds of the nuts of the first correspond to 2/5 of the number of nuts of the second. How many nuts does everyone have?
Draw triangle
Construct right triangle MNO with hypotenuse o = 5 cm and angle MNO = 37°
Saving account
After a year, the bank added 54 euros to Mrs. Eva's savings account. The interest rate on her savings account is 1.25% p.a. How many euros did Mrs. Eva have in her account a year ago?
How many
How many euros will Mr. Kováč earn if he gives two-fifths of his earnings to repay the loan, one-quarter of his earnings for an apartment and a telephone, and he has 350 euros left for other expenses?
Square garden
The square garden has an area of 36 square meters. What area will its image have in the 1:60 scale?
Aquarium shelf area
The block-shaped aquarium is 40 cm high and has a volume of 80 l. What area in m² will it occupy on the shelf on which it is built?
Living room plan
The drawing of the apartment is in the ratio of 1:200. The living room has dimensions of 2cm x 3cm in the picture. How many square meters does the living room have?

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