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Cornerstone · Grades 3–5 Keystones #1 16 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄4

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x + 8 = 38

    Answer: x = 5
  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 250 in the ratio 2:2:1

    Answer: 100, 100 and 50
  5. 5. Statistics Mean

    Calculate the mean of: 33, 33, 50, 29, 35, 38, 41, 24

    Answer: 35.4

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