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

Five GCSE retrieval questions · 7 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 4⁄6

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 25

    Answer: x = 5
  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 117 in the ratio 4:2:3

    Answer: 52, 26 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 24, 45, 36, 35, 43, 40

    Answer: 37.2

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