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Cornerstone · Grades 3–5 Keystones #1 20 August 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 20 August 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄3

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x - 16 = 74

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 170 in the ratio 2:2:1

    Answer: 68, 68 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 21, 39, 31, 20, 42, 21, 11. Give your answer to 2 decimal places

    Answer: 26.43

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