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Cornerstone · Grades 3–5 Keystones #1 23 December 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 December 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄3

    Answer: 8⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x - 14 = 14

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 2:2:1

    Answer: 60, 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 9, 47, 43, 39, 21, 42, 6

    Answer: 29.6

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