Integers - problems

  1. Two numbers 6
    numbers_49 Fill two natural numbers a, b: 7 + blank- blank = 5
  2. Divisibility
    divisibility Is the number 146025 divisible by 6?
  3. Monkey
    monkey Monkey fell in 33 m deep well. Every day her scramble 3 meters, at night dropped back by 2 m. On that day it gets hangover from the well?
  4. Chickens and rabbits
    pipky In the yard were chickens and rabbits. They had 31 heads and 94 legs. How many chickens and how many rabbits was in the yard?
  5. Cats
    cats Two cats caught two mice in two days. How many mouses will catch 6 cats for 6 days?
  6. When will I be a millionaire?
    milionar_kedy Shawn monthly send 220 euros to the bank, which he deposits bear interest of 2.4% p.a. Calculate how many months must Shawn save to save 1000000 euros? Inflation, interest rate changes or bank failures ignore.
  7. Diofant 2
    1diofantos Is equation ? solvable on the set of integers Z?
  8. Trio
    3Soldiers 56 children lined up in groups of three. How many children did not create a trio?
  9. Diofant equation
    diofantos In the set of integers (Z) solve the equation: ? Write result with integer parameter ? (parameter t = ...-2,-1,0,1,2,3... if equation has infinitely many solutions)
  10. Report card
    vysvedcenie_1 Ivor hit 5× grade 5 at the beginning of the school year. How many times must now catch grade 1 to get grade 2 on report card?
  11. Unknown x
    UnknownX If we add to unknown number 21, then divide by 6 and then subtract 51, we get back an unknown number. What is this unknown number?
  12. Sequence
    arithmetic_seq In the arithmetic sequence is a1=-1, d=4. Which member is equal to the number 203?
  13. Dice
    dices How many times must throw the dice, the probability of throwing at least one six was greater than 90%?
  14. Sugar - cuboid
    kocky_cukor Pejko received from his master cuboid composed of identical sugar cubes with count between 1000 and 2000. The Pejko eat sugar cubes in layers. The first day eat one layer from the front, second day one layer from right, the third day one layer above. Yet i
  15. Mistake
    minus Nicol mistake when calculate in school. Instead of add number 41 subtract it. What is the difference between the result and the right result?
  16. Father and son
    father_son Father and son are together 80 years. Son is 28 years younger than father. How old is the son?
  17. Class
    pytagoras_class When Pythagoras asked how many students attend the school, said: "Half of the students studying mathematics, 1/4 music, seventh silent and there are three girls at school." How many students had Pythagoras at school?
  18. Shooter
    terc_1 The shooter fired to a target from distance 11 m The individual concentric circle of targets have a radius increments 1 cm (25 points) by 1 point. Shot was shifted by 8'(angle degree minutes). How many points should win his shot?
  19. Opposite numbers
    plus_minus Calculate opposite numbers (additive inverse) to given ones:
  20. Rectangle
    rectangles_1 The perimeter of the rectangle is 22 cm and content area 30 cm2. Determine its dimensions, if the length of the sides of the rectangle in centimeters is expressed by integers.

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