7th grade (12y) - math problems

Mathematical word problems allow you to practice your mathematics knowledge in everyday life tasks. Word problems train to understand, translate into the mathematical language (e.g., equations), solve it, and check the accuracy and solution discussion.
Choose a topic you want to calculate and improve in.


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

  • On Children's
    bonbons On Children's Day, the organizers bought 252 chewing gums, 396 candies and 108 lollipops. They want to make as many of the same packages as possible. Advise them what to put in each package and how many packages they can make this way.
  • Reciprocal
    inverse It is true (prove it) that if a> b> 0: ?
  • Rope
    lano Peter has a long rope 2 4/5 meter. Martin has a rope 20 cm longer. What distance ropes achieved if the boys link ropes?
  • Set of coordinates
    axes2 Consider the following ordered pairs that represent a relation. {(–4, –7), (0, 6), (5, –3), (5, 2)} What can be concluded of the domain and range for this relation?
  • Icecreams
    zmrzlina Karthik bought 30 icecreams for his birthday .2/5 of them are chocolate icecreams. Find the number of chocolate icecreams he bought?
  • There 17
    kolac There is 3/4 of a cake on a plate in Maria's kitchen.  Silvia sees the cake and eats 1/5 of the cake.  Then Franca takes 1/3 of what was there and shares half of her portion with Antonella.  What fraction of the cake is left?
  • Two diagonals
    koso The diagonals of the diamond EFGH have lengths in the ratio 1: 2. What is the circumference of a rhombus if the longer of the diagonals is 8 cm long?
  • Cuboid and ratio
    kvader Cuboid has dimensions in ratio 1:2:6 and the surface area of the cuboid is 1000 dm2. Calculate the volume of the cuboid.
  • Fisherman
    rybar-ryba Fisherman caught 32 fish, which is four times more than last year. How many fish he caught last year?
  • Latent heat
    ice How much heat is needed to take from 100 g of water at 20°C to cool to ice at -18°C? Mass heat capacity c (ice) = 21kJ/kg / °C; c (water) = 4.19 KJ/kg / °C and the mass group heat of solidification of water is l = 334kJ/kg
  • Two workers
    safarik_stu Two workers make 138 parts/items. The first one produces 30% more than the second. How many items will each produce?
  • Loan 5
    seq_sum Abdul takes a loan of 200000 from Ali and agrees to repay in number of instalment, each instalment begin with the 2nd exceeding the previous one by 1000, if the first instalment is 500, find how many instalment will be necessary to be wipe out the loan? C
  • Chocolate buyer
    cokolada Peter bought 1/2 a pound of chocolate at rocky mountain chocolate factory. Later he went to the sweet shoppie and he bought 6/9 of a pound more chocolate. How much chocolate did he buy that day?
  • Coins
    ticket_mashine In the ticket machine were together one hundred coins. They were only 20 and 50 cent coins. The sum total was 29 euros and 60 cents. How many were in ticket machine coins, and which type?
  • Three friends
    vaha Danica, Lenka, and Dalibor have 96 kg altogether. Lenka weighs 75% more than Dalibor, and Danica weighs 6 kg more than Dalibor. Determine the weight of Danice, Lenka, and Dalibor.
  • Simplify
    numbers3 Simplify the following problem and express as a decimal: 5.68-[5-(2.69+5.65-3.89) /0.5]
  • Pump
    pumpa What power has a pump output to move 4853 hl of water to a height of 31 m for 8 hours?


next math problems »