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Cornerstone · Grades 3–5 Keystones #1 11 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 14 = 42

    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 196 in the ratio 1:4:2

    Answer: 28, 112 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 6, 7, 39, 13, 39, 6, 40, 45

    Answer: 24.4

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