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Cornerstone · Grades 3–5 Keystones #1 3 March 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 March 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 5⁄8

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 198 in the ratio 4:4:1

    Answer: 88, 88 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 49, 9, 24, 48, 47, 39, 5

    Answer: 31.6

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