Numbers - problems

  1. Two buses
    bus27_14 The first bus runs 15 minutes the second bus runs after 21 minutes. Together they both leave at 7:00 on Monday. When and what day will they meet?
  2. Degrees 2
    teplomer_11 The temperature was 3°F and falls four degrees Fahrenheit. What is actually temperature?
  3. Container
    cubes3_9 The container-shaped box with internal dimensions of 3.9 m, 3.25 m and 2.6 m was completely filled with goods in the same cubic boxes. How long edge could this box have?
  4. Written number
    numbers2_49 Place+values x ten thousands =30 thousands
  5. Integer
    abs1 Find the integer whose distance on the numerical axis from number 1 is two times smaller as the distance from number 6.
  6. Equatiom
    negativ_1 Solve equation with negatives: X/(-5) + 2 = -9
  7. Minimum surface
    cuboid_20 Find the length, breadth, and height of the cuboid shaped box with a minimum surface area, into which 50 cuboid shaped blocks, each with length, breadth and height equal to 4 cm, 3 cm and 2 cm respectively can be packed.
  8. Diofant equation
    eq222_19 250x + 120y = 5640
  9. Comparing and sorting
    compare_1 Arrange in descending order this fractions: 2/7, 7/10 & 1/2
  10. Maria
    green-grapes Maria has decided to plant grapes in the garden behind her house. His neighbor Ben has grown grapes successfully for a long time and has given Maria advice on how to plant vines. Ben told her to plant them 3 meters apart in rows that are also 3 meters apar
  11. Expression 8
    expr_1 Evaluate this expressions: a) 5[3 + 4(2.8 - 3)] b) 5×(8-4)÷4-2
  12. My father
    tree3_2 My father has a big farm. 6/8 of it were planted with mango trees, 1/2 of the remainder are guava trees and the rest 10 trees are santol trees. What is the number of all trees?
  13. The Stolen Money
    magic2_1 A man walks into a store and steals a $100 bill. 5 minutes later, he returns to the store and buys stuff worth $70. He pays with the bill that he had stolen, so the owner of the store returns him $30. How many dollars did the store owner lose?
  14. Cube root
    30gon_1 Find cube root of 18
  15. Factors 2
    powers_2 A number has 3 identical factors. If 1 of them is 18. Find the number step by step
  16. To improve
    one_2 To improve her handwriting Paula practices writing the numbers 1 to 200 in words. How many times will she have written the word "one" in all?
  17. Counting number
    numbers2_49 What is the smallest counting number divisible by 2,5,7,8 and 15?
  18. Sum of two primes
    prime_1 Christian Goldbach, a mathematician, found out that every even number greater than 2 can be expressed as a sum of two prime numbers. Write or express 2018 as a sum of two prime numbers.
  19. 7 digit number
    numbers2_49 If 3c54d10 is divisible by 330, what is the sum of c and d?
  20. Expression 6
    numbers2_48 Evaluate expression: -6-2(4-8)-9

Do you have interesting mathematical problem that you can't solve it? Enter it and we can try to solve it.



To this e-mail address we will reply solution; solved examples are also published here. Please enter e-mail correctly and check whether you don't have a full mailbox.