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Cornerstone · Grades 3–5 Keystones #1 24 May 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 24 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 8 = 74

    Answer: x = 11
  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 120 in the ratio 1:1:3

    Answer: 24, 24 and 72
  5. 5. Statistics Mean

    Find the mean of: 8, 17, 5, 9

    Answer: 9.75

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