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Cornerstone · Grades 3–5 Keystones #1 21 May 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 May 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄5

    Answer: 13⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 30

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 13cm

    Answer: 17.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 2:1:1

    Answer: 72, 36 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 31, 16, 12, 28, 12, 33, 15

    Answer: 21

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