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

Five GCSE retrieval questions · 7 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄7

    Answer: 19⁄28
  2. 2. Algebra Two-step equations

    Solve: 4x - 14 = 18

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 65 in the ratio 1:2:2

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

    Find the mean of: 4, 6, 3, 10, 3

    Answer: 5.2

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