Which number is smaller than 27.002 out of 27.004 and 27.001?

Question

The circumference of a bowling ball is less than 27.002 inches, which of the following numbers is les than 27.002, is it 27.001 or 27.004

Answer 1

Since the numbers are all the same length with the same number of decimal places, just remove the decimal points: 27002, 27004, 27001 then take away 27000 from each: 2, 4, 1. Now it's easy to see that 1 is less than 2 so 27.001 is less than 27.002.

Answer 2

27.001

Answer 3

27.004