Question

Write the number of significant digits in 0.6464 :

• A. 4
• B. 3
• C. 5
• D. None of the above

Answer 1

The correct option is A 4

All non-zero numbers are always significant.All zeroes before a non zero number are insignificant. All zeroes which are simultaneously to the right of the decimal point and at the end of the number are significant. The only non significant digit here is the zero before the decimal point.
Hence, number of significant digits is 4.