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Cornerstone · Grades 3–5 Keystones #1 6 March 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 March 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x - 9 = 33

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 91 in the ratio 1:3:3

    Answer: 13, 39 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 47, 50, 33, 28, 12, 44. Give your answer to 2 decimal places

    Answer: 35.67

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