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Cornerstone · Grades 3–5 Keystones #1 16 February 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 6⁄7

    Answer: 31⁄28
  2. 2. Algebra Two-step equations

    Solve: 3x - 7 = 8

    Answer: x = 5
  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

    Share 133 in the ratio 3:4

    Answer: 57 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 22, 50, 38, 7, 34, 24, 12, 41

    Answer: 28.5

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