Question

Which of the following digits are not considered significant?
a.
all nonzero digits
b.
zeroes between nonzero digits
c.
trailing zeroes to the right of the decimal point
d.
leading zeros to the left of the first nonzero digit

Answer 1

d. Leading zeros to the left of the first nonzero digit are not significant — they are only placeholders (e.g., in 0.0052 the two leading zeros are not significant). All nonzero digits, zeros between nonzero digits, and trailing zeros to the right of a decimal point are significant.