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Cornerstone · Grades 3–5 Keystones #1 18 February 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 18 February 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 2⁄6

    Answer: 17⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 50

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Divide 168 in the ratio 2:3:3

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

    Calculate the mean of: 23, 9, 26, 22, 33, 43

    Answer: 26

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