Numbers - math word problems

  1. Rounding
    periodic6 Double round number 727, first to tens, then to hundreds. (double rounding)
  2. Daily average
    weather_forecast Calculate the average temperature during the day, when 15 hours was 20 °C and 9 hours was 13 °C.
  3. Primes 2
    prime_table Which prime numbers is number 2025 divisible?
  4. Denominator
    fraction_half Calculate the missing denominator x: ?
  5. Divisibility 2
    divisors How many divisors has integer number 13?
  6. Divisibility
    nice_circles Determine all divisors of number 84.
  7. Company
    team After increasing the number of employees by 15% company has 253 employees. How many employees take?
  8. Strange x
    pie For what x is true ??
  9. Cubic
    natural_gas Convert 660 m3 of natural gas volume to energy units kWh. Combustion of 1 cubic meter of natural gas is released energy 10.55 kWh.
  10. Gauss
    kfgauss Help little C.F. Gauss sum all the integers from 1 to 400.
  11. Is equal
    Shazam Is equal following terms? ?
  12. School
    trieda 27 students of 6.D class is going to a trip. They pay 9 € each. The teacher got 153 €. How many children have not paid?
  13. Root
    sq_root Use law of square roots roots: ?
  14. Determine the number
    fib2 Determine the number x that ?.
  15. Quadratic equation
    parabola Determine the numbers b, c that the numbers x1 = -1 and x2 = 3 were roots of quadratic equation: ?
  16. Diofant 2
    1diofantos Is equation ? solvable on the set of integers Z?
  17. Pumps
    pool_pump The tank is filled with two pumps in 16 minutes. The first pump is filled in 30 minutes earlier than two one. How many minutes is filled with the first pump?
  18. Biquadratic
    bikvadraticka By introducing a new variable solve biquadratic equation: ?
  19. Diagonals of the rhombus
    diagonals_rhombus Calculate height of rhombus whose diagonals are 12 cm and 19 cm.
  20. Trigonometric functions
    trigonom In right triangle is: ? Determine the value of s and c: ? ?

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