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Cornerstone · Grades 3–5 Keystones #1 9 May 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 2⁄5

    Answer: 21⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x - 9 = 15

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 252 in the ratio 3:2:4

    Answer: 84, 56 and 112
  5. 5. Statistics Mean

    Find the mean of: 7, 18, 12, 6, 3

    Answer: 9.2

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