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Cornerstone · Grades 3–5 Keystones #1 20 June 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 June 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄3

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 14 = 38

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 207 in the ratio 3:2:4

    Answer: 69, 46 and 92
  5. 5. Statistics Mean

    Calculate the mean of: 10, 48, 22, 33, 7, 15, 12, 22

    Answer: 21.1

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