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Cornerstone · Grades 3–5 Keystones #1 6 May 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 May 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄8

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 19 = 21

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 3:2:1

    Answer: 81, 54 and 27
  5. 5. Statistics Mean

    Find the mean of: 15, 19, 2, 14, 12

    Answer: 12.4

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