How many significant figures there are in 0.04?

Answer: One

The significant figures of a given number are those significant or important digits, which convey the meaning according to its accuracy.

  • All non-zero digits are significant. 178346 contains six significant digits.
  • All zeros that occur between any two non-zero digits are significant. For example, 306.0086 contains seven significant digits.
  • All zeros that are on the right of a decimal point and also to the left of a non-zero digit is never significant. For instance, 0.00768 contained three significant digits.
  • Zeros before the decimal point are not significant.

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