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Cornerstone · Grades 3–5 Keystones #1 21 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 59 + 19

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

    Solve: 5x - 8 = 67

    Answer: x = 15
  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

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Find the mean of: 11, 15, 17

    Answer: 14.333333333333