Question

Which of the following has two significant figures?

• A. $0.070$
• B. $0.70$
• C. $7.0$
• D. $70$

Answer 1

Answer: (A), (B), (C)

The correct options are
A $0.070$
B $7.0$
C $0.70$

Leading Zeroes are not significant because these zeroes only serve as space holder. They are there to put decimal point in correct location. Trailing zeroes in a number containing decimal point are significant.

Leading zeroes in whole number are never significant so 70 has only 1 significant figure.

So, option A, B and C are correct.