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Cornerstone · Grades 3–5 Keystones #1 24 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 25 + 15

    Answer: 35
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 55

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 154 in the ratio 2:1:4

    Answer: 44, 22 and 88
  5. 5. Statistics Mean

    Calculate the mean of: 36, 28, 23, 37, 20, 35, 42

    Answer: 31.6