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Cornerstone · Grades 3–5 Keystones #1 9 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 9 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 3 = 73

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 5cm

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 1:4:1

    Answer: 23, 92 and 23
  5. 5. Statistics Mean

    Find the mean of: 11, 8, 20, 2, 7

    Answer: 9.6

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