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Cornerstone · Grades 3–5 Keystones #1 4 May 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 May 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 3x + 6 = 42

    Answer: x = 12
  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 52 in the ratio 2:1:1

    Answer: 26, 13 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 45, 38, 22, 18, 35, 38, 33

    Answer: 32.7

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