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Cornerstone · Grades 3–5 Keystones #1 23 April 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 16

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 114 in the ratio 2:1

    Answer: 76 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 29, 10, 16, 49, 22, 31. Give your answer to 2 decimal places

    Answer: 26.17

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