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Cornerstone · Grades 3–5 Keystones #1 25 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 39

    Answer: x = 9
  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 48 in the ratio 2:1

    Answer: 32 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 28, 21, 15, 47, 12, 43. Give your answer to 2 decimal places

    Answer: 27.67

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