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Cornerstone · Grades 3–5 Keystones #1 14 December 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 35

    Answer: x = 7
  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 15 in the ratio 1:2

    Answer: 5 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 38, 29, 42, 15, 46, 18, 35. Give your answer to 2 decimal places

    Answer: 31.86