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Cornerstone · Grades 3–5 Keystones #1 12 December 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 1⁄3

    Answer: 13⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 15

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 175 in the ratio 2:4:1

    Answer: 50, 100 and 25
  5. 5. Statistics Mean

    Find the mean of: 13, 4, 9

    Answer: 8.6666666666667

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