Q. The number of significant figures in all the given numbers 25.12, 2009, 4.156 and $1.217\ \times 10^{- 4}$ is
A) 1
B) 2
C) 3
D) 4
Explanation
The number of significant figures in all of the given numbers is 4.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.