Multiplication - examples - page 14

  1. Virus
    virus We have a virus that lives one hour. Every half hour produce two child viruses. What will be the living population of the virus after 2.5 hours?
  2. Add symbols
    plusminus_2 Add marks (+, -, *, /, brackets) to fullfill equations 1 3 6 5 = 10 This is for the 4th grade of the primary school - with no negative numbers yet
  3. Sick
    tabletky Sick Marcel already taken six tablets, which was a quarter of the total number of pills in the pack. How many pills were in the pack?
  4. Mountain
    manga_parbat Mountain has the elevation 7450 meters and in the morning is the middle portion thereof in the clouds. How many meters of height is in the sky if bellow the clouds is 2,000 meters and above clouds are two fifths of elevation of the mountain?
  5. Number
    numbers_10 Which number is 17 times larger than the number 6?
  6. Kangaroo
    klokan_1 Kangaroo do 10 jumps in 1 minute and then three minutes lie , then will make 10 jumps in 1 minute and 3 minutes lie, and so on. Find the shortest time in which kangaroo do 30 jumps.
  7. Classroom 4
    skola_1 In a class of 36 pupils, 2/3 are girls. How much it is in a class girls and boys?
  8. Beautiful alley
    stromy_8 In the alley 4 rows of 10 trees and 5 rows of 8 trees blossomed. Six of the trees have already blossomed. How many trees still bloom in the alley?
  9. Milk
    milk_1 Mum bought 16 cartons of milk. One carton of milk weight 0.925 kg. How many weight all purchase?
  10. Z7-I-4 stars 4949
    hviezdicky_mo Write instead of stars digits so the next write of product of the two numbers to be valid: ∗ ∗ ∗ · ∗ ∗ ∗ ∗ ∗ ∗ ∗ 4 9 4 9 ∗ ∗ ∗ ∗ ∗ ∗ 4 ∗ ∗
  11. MO Z6-6-1
    kruhy_1 Write integers greater than 1 to the blanks in the following figure, so that each darker box was product of the numbers in the neighboring lighter boxes. What number is in the middle box?
  12. Summerjobs
    agentura The agency give summerjobs for 2352 students in 2015. The eighth was high-school students, the rest was undergraduates. How many undergraduates works via agency in 2015?
  13. Oceans
    oceans The Earth's surface is approximately 510,000,000 km2 and is 7/10 covered by oceans. Of which 1/2 covers the Pacific Ocean, the Atlantic Ocean 1/4, the Indian Ocean 1/5 and the Arctic Ocean 1/20. What parts of the Earth's surface cover each ocean?
  14. Unknown number 16
    numbers_35 My number's tens is three times more then ones My number's ones is twice the number of thousands and my number's hundreds is half the number of of tens. I have two ones. which number am I?
  15. Sales off
    lacnejsie shoes cost x euros. First they are discounted by 50%, and then 25% of the new amount. Determine what percentage of the total cost is cheaper.
  16. Zucchini
    cukety One zucchini costs 5 CZK. How much would cost four?
  17. Ratio - proportion
    ratios2 Reduce the number 16 in proportion 3:2 5:4 11:8
  18. Rolls
    rozky_2 Mom every day buys 6 rolls. On Friday buys 2 times as much. How many rolls buys on Friday?
  19. Price increase 2x
    percents_3 If two consecutive times we increase the price of the product by 20%, how many % is higher final price than the original?
  20. Prize
    metals_1 How many ways can be rewarded 9 participants with the first, second and third prize in a sports competition?

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