Reason - practice for 10 year olds
Number of problems found: 187
- Four-digit 82023
How many four-digit numbers are there in which there are at least three eights - Twenty-five 81187
Twenty-five prizes are drawn in a raffle with 500 tickets. How many tickets do we need to buy to ensure I win at least 3 prizes? - Minutes 80992
Three eggs are cooked in 15 minutes; how long will it take to cook 15 eggs at once? - Dimensions 80753
We color a wooden block with dimensions a = 4 cm, b = 3 cm, c = 2 cm and then cut it into cubes of 1 cm³. How many cats will she have? a) just one wall painted b) just two walls stained c) just three walls painted d) no painted wall?
- Seven-liter 80518
Happy Mom needs to measure exactly 6 liters of water. It only has a five-liter and a seven-liter container. How can a mother measure exactly 6 liters of water by gradually pouring? He doesn't care about other containers. - Simultaneously 80392
Dulikovci, Elikovci, Filikovci, and Galikovci visited each other often last month. Each family visited each family exactly once. How many visits did all four families make together? If two families came to visit one family simultaneously, count it twice. - Apples
Three types of apples are mixed in a box. What is the smallest number of apples we have to take from the box so that there are certainly at least three apples of the same kind among them? (Explain your solution!) - Average 66794
Look for three numbers with an average of 2000. The middle number is 2000 - Achievement 66164
The test consisted of 50 questions, each with one possible correct answer. The test result is given by the sum of the correct answers, a maximum of 100 points. The criterion for admission was the achievement of 50 points. The study applicant answered 36 q
- Expressions 62284
Express the numbers 18, 28, 32, 40, 48, and 200 as numeric expressions composed of the digits 5. - 4 digit number
I am a four-digit number. My thousand period has a first digit which is thrice the second digit, and the second digit is two more than the third digit. All the rest of the digits are zeros. What number am I? - Exchanged 59993
Lukáš and Laco exchanged stamps. Before the exchange, Lukáš had 25 more marks than Laco. After the exchange, he had more Laco marks. At least how many stamps does Laco receive from Lukáš? - White balls
I have three white balls and five red balls in my pocket. How many balls do I have to remove from the bag to ensure the pulled-out ball is red? - Competitors 49101
Competitors drove two-fifths of the race route in 60 minutes. How long before they passed the first fifth? How long was the race? And did they still drive at the same speed?
- Organizers 45351
The ski organizers have to print the start numbers from 1 to 45. How many times do they use the number 3 when printing? - Pedestrian 40151
The pedestrian will drive 5 km in 1 hour The car will travel 90 km in 1 hour How many times is a pedestrian slower than a car? - Together 32831
Aleš has one coin, Boris and Cyril each have two coins. Aleš has 5 Sk more than Boris and 5 Sk less than Cyril. Note Czech coins are 1, 2, 5, 10, 20, 50 Sk. Aleš has ___ Sk. Boris has ___ Sk and ___ Sk. Cyril has ___ Sk and ___ Sk. Together, they have ___ - Everyday
One employee leaves with two briefcases every day and returns on the 4th day. These two briefcases won't be available till the 05th day as the departing employee leaves before the briefcases arrive back and are adequately cleaned. How many briefcases are - On the floor
You enter the room, and there are two dogs, four horses, one giraffe, and one duck on the bed. Three chickens are flying over the chair. How many feet are on the floor?
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