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WAEC 2021 · Paper 1 · Q1

Correct 0.007985 to three significant figures.

Worked solution (try it first)
  1. The zeros after the point are not significant, so the first three significant figures are 7, 9 and 8.
  2. The next figure is 5, so round the 8 up to 9: 0.00799, option C.

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