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Cornerstone · Grades 3–5 Keystones #1 4 December 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄5

    Answer: 41⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 16

    Answer: x = 12
  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 96 in the ratio 1:1:4

    Answer: 16, 16 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 36, 43, 38, 26, 24, 5, 14. Give your answer to 2 decimal places

    Answer: 26.57

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