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Cornerstone · Grades 3–5 Keystones #1 17 November 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 November 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 7⁄8

    Answer: 29⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 42

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 98 in the ratio 1:2:4

    Answer: 14, 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 24, 6, 5, 17, 13, 5. Give your answer to 2 decimal places

    Answer: 11.67

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