How many significant figures are in the number 123.97

5 significant figures

Step-by-step explanation:

Any first number than starts with > 0, it is counted as significant figures and with 0 in the middle of number, also will be counted. But if the first number is 0, you have to skip to the next number.

e. g

0.0567 = 3s. f

1.542 = 4s. f

0.0000012 = 2s. f

1200586 = 7s. f

87000000002 = 11s. f

5 significant