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Cornerstone · Grades 3–5 Keystones #1 23 January 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 23 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄8 + 3⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 25

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

    Calculate the hypotenuse when a = 11cm and b = 13cm

    Answer: 17.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 128 in the ratio 1:3:4

    Answer: 16, 48 and 64
  5. 5. Statistics Mean

    Find the mean of: 6, 10, 4, 7

    Answer: 6.75

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