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Cornerstone · Grades 3–5 Keystones #1 4 July 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄8

    Answer: 47⁄56
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 67

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 10cm

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Divide 319 in the ratio 3:4:4

    Answer: 87, 116 and 116
  5. 5. Statistics Mean

    Calculate the mean of: 49, 9, 49, 30, 29, 30, 20

    Answer: 30.9

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