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Could You Actually Pass GCSE Stats Now?

You can use a calculator – it's pretty hard. Questions adapted from AQA "Statistics and Number" past papers.

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  1. 1.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    15
    Correct
    Incorrect
    25
    Correct
    Incorrect
    5
    Correct
    Incorrect
    35
    Correct!
    Wrong!

    A quarter of the balls are green, so 25 greens. There are twice as many blues as greens, so 50 blues. There are one-fifth as many reds as blues, so 10 reds. Add them together and you get 85, so the remaining 15 must be white.

    Via ThinkStock
  2. 2.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    23.5
    Correct
    Incorrect
    11.1
    Correct
    Incorrect
    14.4
    Correct
    Incorrect
    20
    Correct!
    Wrong!

    1430 - 1250 = 180. 180 ÷ 1250 = 0.144. 0.144 x 100 = 14.4.

  3. 3.

    ThinkStock
    Correct
    Incorrect
    0.5
    Correct
    Incorrect
    0.9
    Correct
    Incorrect
    0.4
    Correct
    Incorrect
    0.7
    Correct!
    Wrong!

    28 ÷ 40 = 0.7.

  4. 4.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    6 red, 3 white, 1 blue
    Correct
    Incorrect
    5 red, 3 white, 2 blue
    Correct
    Incorrect
    7 red, 2 white, 1 blue
    Correct
    Incorrect
    8 red, 1 white, 1 blue
    Correct!
    Wrong!

    You'd expect 7 out of 10 reds to give a relative frequency of 0.7.

  5. 5.

    Correct
    Incorrect
    25 : 18
    Correct
    Incorrect
    2 : 1
    Correct
    Incorrect
    32 : 11
    Correct
    Incorrect
    9 : 7
    Correct!
    Wrong!

    You multiply the ratios together, so it's (10 x 5) : (5 :4), or 50 : 36. Then you need to see if both sides can be divided by anything to give you the simplest version. In this case, dividing them both by 2 gives you 25 : 18.

  6. 6.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    £6,500
    Correct
    Incorrect
    £6,775
    Correct
    Incorrect
    £7,225
    Correct
    Incorrect
    £7,775
    Correct!
    Wrong!

    The way to work it out is 9,000 ÷ 1.05^3 = 7,774.54.

  7. 7.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    Yes
    Correct
    Incorrect
    No
    Correct!
    Wrong!

    24 ÷ 40 = 0.6, so less than 2/3rds.

  8. 8.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    8
    Correct
    Incorrect
    9
    Correct
    Incorrect
    12
    Correct
    Incorrect
    15
    Correct!
    Wrong!

    There are three possible "starter and main" combinations, and six possible "main and dessert" combinations, for a total of nine.

  9. 9.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    1/5
    Correct
    Incorrect
    2/5
    Correct
    Incorrect
    1/3
    Correct
    Incorrect
    2/3
    Correct!
    Wrong!

    There are nine possible combinations; three of them include jelly.

    So it's 3/9 or 1/3.

  10. 10.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    5
    Correct
    Incorrect
    9
    Correct
    Incorrect
    11
    Correct
    Incorrect
    13
    Correct!
    Wrong!

    You know that spruce trees + pine trees + 2 = fir trees. 27 fir trees and 16 pine trees have been sold. So 27 - 26 - 2 = 9.

  11. 11.

    ThinkStock / BuzzFeed
    Correct
    Incorrect
    4.4 x 10^5
    Correct
    Incorrect
    4.4 x 10^6
    Correct
    Incorrect
    4.4 x 10^8
    Correct
    Incorrect
    4.4 x 10^523
    Correct!
    Wrong!

    The correct answer is 437,062, or 4.4 x 10^5.

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