Question

Which of the following have same number of significant figures ? 

(A) 0.00253 

(B) 1.0003 

(C) 15.0 

(D) 163 

Choose the correct answer from the options given below 

(1) A, B and C only 

(2) C and D only 

(3) A, C and D only 

(4) B and C only

Answer 1

(3) A, C and D only 

All non zero digits are significant. 

0.00253 

Significant figures = 3(2, 5, 3) 

1.0003 

Zeros between non-zero digit are significant. 

Thus, 1.0003 has 5 significant figures. 

15.0 

Significant number = 3 

163 

Significant number = 3

Options (3) – A, C and D