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Cornerstone · Grades 3–5 Keystones #1 2 September 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄6

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 20

    Answer: x = 10
  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 160 in the ratio 2:3:3

    Answer: 40, 60 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 25, 33, 6, 36, 49, 37, 11

    Answer: 28.1

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