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Cornerstone · Grades 3–5 Keystones #1 21 December 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄8

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 23

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 2:1:2

    Answer: 48, 24 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 22, 44, 9, 7, 32, 43, 13

    Answer: 24.3

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