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Cornerstone · Grades 3–5 Keystones #1 9 December 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 81

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 1:4:1

    Answer: 24, 96 and 24
  5. 5. Statistics Mean

    Find the mean of: 19, 7, 10

    Answer: 12

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