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Cornerstone · Grades 3–5 Keystones #1 17 May 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 17 May 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 4⁄6

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

    Solve: 2x - 19 = -1

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 208 in the ratio 3:3:2

    Answer: 78, 78 and 52
  5. 5. Statistics Mean

    Find the mean of: 19, 10, 2

    Answer: 10.333333333333

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