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Cornerstone · Grades 3–5 Keystones #1 9 February 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 5⁄6

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 57

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 190 in the ratio 3:3:4

    Answer: 57, 57 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 17, 6, 34, 40, 8, 16, 42, 12

    Answer: 21.9

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