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Cornerstone · Grades 3–5 Keystones #1 24 September 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 24 September 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 3⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 5 = 32

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 2:1:3

    Answer: 24, 12 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 12, 31, 21, 42, 20, 37, 16

    Answer: 25.6

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