Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Digital Literacy Computer Basics Computer Basics Binary

what number is represented by 01111

what number is represented by 01111

2 Answers

01111 = (0 × 2⁴) + (1 × 2³) + (1 × 2²) + (1 × 2¹) + (1 × 2⁰) = 15

Michael Shields
Michael Shields
12,638 Points

Kris is correct, just want to add a method to help get used to reading binary quick and avoid frustration when calc'ing the conversion by hand...create a quick table on paper like below, don't get fooled by going right-to-left again. Cheers!

0 1 1 1 1


2^4 2^3 2^2 2^1 2^0