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Cornerstone · Grades 3–5 Keystones #1 5 May 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 May 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 7⁄8

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

    Solve: 2x - 17 = 13

    Answer: x = 15
  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

    Divide 171 in the ratio 1:4:4

    Answer: 19, 76 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 28, 32, 12, 18, 20, 9, 48. Give your answer to 2 decimal places

    Answer: 23.86

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