Prime numbers - math word problems - page 11 of 27
Number of problems found: 540
- Number combination
1. How many different options are there for exchanging a ten-euro bill with one-euro, two-euro, and five-euro bills? a) 5 b) 8 c) 14 d) 10 2. How many non-repeating three-digit numbers can be written using odd digits? a) 999 b) 225 c) 60 d) 25 - Census pyramid
Walter added five different prime numbers to the top row of the census pyramid. Their sum was 50. What was the biggest number he could get "down"? - Number probability calculation
1. What is the probability that we write an even number from the numbers from 1 to 20? 2. We randomly draw one ticket From the eighteen tickets numbered 1 - 18. What is the probability that the ticket drawn will have: a) a number divisible by 3 c) a prime - Pastries for seniors
The organizers bought pastries for a gathering at the Seniors' Home so cleverly that each table would have the same assortment of these pastries. They bought 45 cream puffs, 63 vanilla wreaths, 99 meringues, and 27 cream rolls. Can you determine from thei - Four-digit The number is four digits, even, and divisible by five. - The third digit is the highest prime number from 0 to 10. - The first digit is the quotient when any number is divided by itself. - The second digit is obtained by adding twice the first digit to t
- Gear turn calculation
Two gears – one smaller and one larger rotate so that the teeth of both wheels mesh together. The first wheel has 18 teeth, the second 27. How many times does each wheel turn before returning to its starting position? - Bus meeting time
Three lines depart from the bus terminal at 5:30 in the morning. At what time will all three buses meet again at the terminus first, if one has intervals of 10 minutes, the second 12 minutes, and the third 15 minutes? - Lamps on playground
The playground has the shape of a rectangle of 36 x 50 m. After how many meters can place the lamps on its lighting, if the distances between them are to be the same on both sides if the builders want to use the smallest possible number of lamps? - Divisors of 560 Which of the numbers 5, 6, 7, 14, and 15 are divisors of 560? Please justify the answer.
- The missing digit Complete the missing digit in the number 3 ∗ 43 to form a number divisible by three. If there are multiple options, list them all. (The omitted digit is marked with the symbol ∗. ) Answers must be justified!
- Prime factors
Factor the number 6600 into the product of prime numbers. - Ratio
Alena collected 7.8 kg of blueberries, 2.6 kg of blackberries, and 3.9 kg of cranberries. Express the ratio in the smallest natural numbers in this order. - Greece trips
People travel to the seaside in Greece for 8-day, 10-day and 12-day stays. An assigned delegate flies there and back with each group of passengers. On May 1, all three groups and their delegates will fly to the sea simultaneously. When will all three dele - On a
Someday, the Sun, Venus, and the Earth will be in eclipse, i.e., Venus will be between the Sun and the Earth. Venus orbits the Sun in 225 days. In how many years will all three bodies be in alignment again? - Principle - 3CC
According to a certain principle, three-digit natural numbers are divided into two groups: The 1st group includes, for example, the numbers: 158, 237, 689, 982, 731, 422, … The 2nd group includes, for example, the numbers: 244, 385, 596, 897, … Discover t - Drivers Driver Frank and driver Charles are friends. They leave the start-stop at the same time in the afternoon - at 13.30. When will they meet again if Frank goes around his route in 50 minutes and Charles in 40 minutes?
- Wheel teeth calculation The white wheel has 24 teeth. The black wheel has fewer teeth than the white wheel. Both wheels return to their initial position for the first time after two revolutions of the white wheel. How many teeth does the black wheel have?
- Diameters of euro coins
When paying, we use euro coins with the following diameters: The 10-cent coin has a diameter of 19.75 mm. The 20-cent coin has a diameter of 22.25 mm. The 50-cent coin has a diameter of 24.25 mm. Find out in what ratio the diameters of these coins are. - Dividing nuts
How many nuts do you have when dividing them between 2, 3, 4, 5, 6, 8, and 10 children? (smallest possible number) - Tram stop
The blue tram stops every 12 minutes, and the red one stops for 8 minutes. At 8 o'clock, they left the stop together. How many times do they meet at a stop before 11 AM?
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