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

  1. 1. Number Adding fractions

    Add: 4⁄6 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 20 = 76

    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 171 in the ratio 2:4:3

    Answer: 38, 76 and 57
  5. 5. Statistics Mean

    Find the mean of: 4, 8, 6

    Answer: 6

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