Question

how many significant figures are in the number 101?
4
3
2
1

Explanation:

Step1: Recall significant - figure rules

Non - zero digits are always significant. Zeros between non - zero digits are significant.

Step2: Analyze 101

In the number 101, 1 is a non - zero digit and the 0 is between two non - zero digits. So all three digits (1, 0, 1) are significant.

Answer:

B. 3