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Cornerstone · Grades 3–5 Keystones #1 20 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 2⁄10

    Answer: 3⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 45

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

    Calculate the hypotenuse when a = 9cm and b = 5cm

    Answer: 10.3cm
  4. 4. Ratio Sharing in a ratio

    Divide 220 in the ratio 2:2:1

    Answer: 88, 88 and 44
  5. 5. Statistics Mean

    Find the mean of: 3, 13, 17

    Answer: 11

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