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Cornerstone · Grades 3–5 Keystones #1 5 January 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 January 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 3⁄5

    Answer: 17⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x + 4 = 53

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:3:1

    Answer: 42, 63 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 34, 38, 34, 47, 11, 17, 44. Give your answer to 2 decimal places

    Answer: 32.14

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