Math word problems

From our database of math word problems and examples we offer:

• Christmas balls
  On the Christmas tree we put 21 Christmas balls of two colors. Eight of them were blue. How many Christmas balls was red?
• Two aircraft
  From the airport will start simultaneously two planes, which fly tracks are perpendicular to each other. The first flying speed of 680 km/h and the second 840 km/h. Calculate how far the aircraft will fly for half an hour.
• Four sided prism
  Calculate the volume and surface area of a regular quadrangular prism whose height is 28.6cm and the body diagonal forms a 50-degree angle with the base plane.
• Sum and rounding
  I know two numbers whose sum is 20. When they each round and then added together I get the 30. What are this numbers?
• Clay
  How many cubic centimeters of clay is in a pit of dimensions 4 m x 3 m x 3 m?
• Simple equation 10
  35= 7*3*x what is x?
• Two balls
  Two balls, one 8cm in radius and the other 6cm in radius, are placed in a cylindrical plastic container 10cm in radius. Find the volume of water necessary to cover them.
• Orchard
  One-eighth of the trees in the fruit plant in winter froze and one-twelfth of damaged disease and pests. Healthy trees remained 152. Is it enough to supply 35 trees to restore the original number of trees in the orchard?
• Common ratio
  If 200 units of a commodity are consumed in a first year, and if the annual rate of increase in consumption is 5% (a) what amount is consumed in the 8th year; (b) in the first 15 years?
• Two gardens
  The total area of the two gardens is 864 m². The first garden is 60 m² smaller than three times the second garden. What is the area of each garden?
• The town
  The town population is 56000. It is decreasing by 2% every year. What will be the population of the town after 13 years?
• Nuts, girl and boys
  Milena collected fallen nuts and called a bunch of boys let them share. She took a condition: the first boy takes one nut and tenth of the rest, the second takes 2 nuts and tenth new rest, the third takes 3 nuts and tenth new rest and so on. Thus managed
• Magnified cube
  If the lengths of the edges of the cube are extended by 5 cm, its volume will increase by 485 cm³. Determine the surface of both the original and the magnified cube.
• Cube cut
  The cube ABCDA'B'C'D ' has an edge of 12cm. Calculate the area of diagonal cut B DD'B '.
• Diagonals
  What x-gon has 54 diagonals?
• Derivation
  Exists a function whose derivation is the same function?
• Rhombus 2
  Calculate the rhombus area, which has a height v=48 mm and shorter diagonal u = 60 mm long.