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Cornerstone · Grades 3–5 Keystones #1 11 January 2023 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 3⁄5

    Answer: 59⁄40
  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 297 in the ratio 4:4:3

    Answer: 108, 108 and 81
  5. 5. Statistics Mean

    Calculate the mean of: 48, 10, 46, 37, 14, 17, 47, 38

    Answer: 32.1

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