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Cornerstone · Grades 3–5 Keystones #1 19 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 19 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x - 10 = 39

    Answer: x = 7
  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 126 in the ratio 2:3:1

    Answer: 42, 63 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 30, 49, 7, 19, 33, 17, 23

    Answer: 25.4

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