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Cornerstone · Grades 3–5 Keystones #1 19 January 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 January 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 2⁄5

    Answer: 37⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 77

    Answer: x = 13
  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

    Share 91 in the ratio 4:3

    Answer: 52 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 18, 44, 48, 45, 48, 7, 41. Give your answer to 2 decimal places

    Answer: 35.86

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