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Cornerstone · Grades 3–5 Keystones #1 11 February 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 4⁄6

    Answer: 26⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 25

    Answer: x = 6
  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 160 in the ratio 2:2:1

    Answer: 64, 64 and 32
  5. 5. Statistics Mean

    Find the mean of: 8, 2, 16, 8

    Answer: 8.5

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