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Cornerstone · Grades 3–5 Keystones #1 12 December 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 12 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 3⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = 3

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 2:1:2

    Answer: 72, 36 and 72
  5. 5. Statistics Mean

    Find the mean of: 16, 4, 7, 7, 8

    Answer: 8.4

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