Maths practice for 14 year olds - page 34 of 368
Number of problems found: 7344
- Checkouts
When 4 checkouts are open in a supermarket, customers wait in line for an average of 12 minutes. By how many minutes does the waiting time increase when one checkout is closed? - Goalkeeper - success rate
Calculate the save percentage of a hockey goalkeeper who saved 30 out of 32 shots on goal during a match. - A car license plate
A car licence plate consists of one letter (out of 26) and six digits. How many different plates can be formed if the letter is always in the second position and cannot be adjacent to a zero? - Rent increase
Calculate how much rent should be increased each year to keep pace with annual inflation of 7%. The rent in the first year is €550. Calculate the correct rent for each of the first 5 years so that the real value of the rent remains constant. - Beekeeper 2
A beekeeper has more than 190 kg and less than 200 kg of honey. If he divides it into 8 kg jars, 3 kg remain. If he divides it into 7 kg jars, how many kg remain? How many kg of honey does he have? - MDZ - theater
There are 798 men, women, and children in a theatre. The number of men is twice the number of women. The number of women is twice the number of children. How many men, women, and children are there? - Deep pool - bottom
A pool is 25 m long and 12 m wide. In one half of the pool, the depth is constant at 1.8 m; in the other half, the bottom slopes gradually up to a depth of 1.2 m. What is the total area of the pool bottom? - On a job
On a job, Peter harvested 150 kg of apples and John harvested 130 kg of apples. They divided a reward of 2,660 CZK in proportion to the apples harvested. How much did each receive? - Servings for a dog
Jana is going to eat two sausages for dinner, and Andrew is going to eat 4 sausages. A stray dog came along, and they each gave it half a sausage. Who gave the dog more (meaning a larger share of their own portion)? - Branded
Branded trainers are now selling for 2,394 CZK. The seller first reduced the original price by 5%, and then reduced the new price by a further 10%. What was the original price? What was the total discount? How much of the original price represents 21% VAT - Effective rate
Calculate the effective health-insurance contribution rate of a beginning self-employed person, if he applies a flat-rate expense of 60%, after deduction of expenses the tax base is divided by the Bulgarian constant 1.486 and then contributions are paid - - Aukro commission
Aukro - the Slovak and also the Czech versions charge various, non-transparent fees (fee for successful sale, commission, buyer protection, service fee). We therefore did a real experiment to determine how much actually Aukro takes. We sold and bought a b - Jewellery-maker
A jewellery-maker threads 5 beads in 20 seconds. A necklace consists of 210 beads, 30 are already threaded. a) Write an equation of the dependence of the number of threaded beads on time (in minutes), during which the jewellery-maker will be threading the - Morse code 2
We have two characters: a dot and a comma. How many two-character and three-character sequences can be created using them, with repetition allowed? - Hexagon, hexa S, V
What is the surface area and volume of a regular hexagonal prism with a base edge of 12 cm and a height equal to the diameter of the circle circumscribed about the base? - View angle
From a tower 20 m high and 20 m away from a river, the width of the river appears to span an angle of 15°. How wide is the river at this location? - After-school club
30 children in a school club need to split into two teams. They put 15 white and 15 black marbles into a basket and draw lots. The teams will be made up of children who draw marbles of the same colour. Patricia drew first and pulled out a white marble. Af - 216 surface area and volume
Calculate the surface area and volume of a regular tetrahedral pyramid with base edge a = 6 cm and height of 12 cm. - Pure gold
How much pure gold is in a 15-gram ring made of 14-carat gold? Round the result to the nearest tenth of a gram. - Sale of a bill of exchange
A businessman bought a bill of exchange 6 months before its maturity. After deducting interest at an annual rate of 10%, he paid €19,000 for it. How much interest was deducted from the face value of the bill?
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