Simple proportion + ratio - math problems

Number of problems found: 52

  • Candies
    bonbons There are red, blue and green candies in bad. Red to green is in 6:11 ratio and blue to red in a 7: 5 ratio. In what proportion are blue to green candies?
  • Proportion 3
    apples For every 8 mango trees in the orchard, there are 4-star apple trees. If there are 1320 trees, how many trees of each kind are there?
  • Ratios
    gule Reduce the numbers: 50 in a 1:2 ratio 111 at a ratio of 2:3 70 at 10:50 560 at a ratio of 3:8
  • A map
    mapa A map of size 60cm by 25cm is reduced in the ratio of 3:5, twice. What are the new dimensions?
  • Gold inheritance
    dukat The king divided the inheritance with his three sons in the ratio of 7: 6: 4. Two of them received 286,000 gold. How much each of the sons got.
  • Proportional relationship
    ratios2 The ordered pairs (6,24) and (1, s) represent a proportional relationship. Find the value of s.
  • Mixture of nuts
    vahy2 Alice bought a mixture of nuts containing cashew nuts, hazelnuts and peanuts in a ratio of 1: 2: 3. Calculate the weight in grams of the whole mixture if the peanuts weigh 90 g.
  • Five mechanics
    car Five mechanics will make a car for some time. How many cars can 30 mechanics produce at the same time?
  • Rails
    rails 18 m railway weighs 1260 kg. How much weighs 100 m of welded railways?
  • Two brothers
    mapa_ta3 The two brothers were to be divided according to the will of land at an area of 1ha 86a 30m2 in a ratio of 5:4. How many will everyone get?
  • Painters
    time Ten painters paint the school in 20 days. How many days do four painters paint the school at the same pace of work?
  • Pumps
    pumps Five pumps pumped 1,800 hl of water for 3 hours. How many hectoliters of water pump same two powerful pumps for six hours?
  • R1+R2 in parallel
    resistor The resistance ratio of the first and second resistors is 3: 1 and the current flowing through the first resistor is 300 mA. What current flows through the second resistor (resistors connected in parallel)?
  • The straight
    12perctent The straight path rises by 72 cm every 3 m of its length. How many meters will it climb to 350 m?
  • Six percents
    trojuholnik 6% of the base is 21. How much is 28% of this base?
  • Two villages
    mapa On the map with a scale of 1:40000 are drawn two villages actually 16 km away. What is their distance on the map?
  • Everyone drinks the same
    beers 24 bricklayers drink 72 beverage bottles a day at the construction site. How many bottles would 19 bricklayers need? Everyone drinks the same.
  • Five pumps
    nadrz The water tank is filled with two pumps in 48 minutes. How long would it take to fill it with 5 same pumps?
  • Snack
    minca CZK 450 was paid for a snack for 30 pupils. How many CZK will we pay for the same snack for 28 pupils?
  • Save trees
    stromy 25 tons of old paper will save 1,600 trees. How many tons of paper is needed to save the 32 trees in the park?

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