Quiz #6: What is 0x20 in decimal?
// WHAT YOU WILL LEARN
What is 0x20 in decimal? (32)
// LESSON NOTES
Quick quiz! What is 0x20 in normal (decimal) numbers? 🤔
A) 20 B) 32 C) 16 D) 200
Comment your answer before the reveal! 👇
✅ Answer: B — 32!
1️⃣ HEX PLACE VALUES: in hex (base 16) the right digit counts ones, the left digit counts sixteens. Digits go 0–9, then A–F (A = 10 … F = 15).
2️⃣ THE MATH: 0x20 = 2 × 16 + 0 × 1 = 32.
3️⃣ IN BINARY: 32 = 0b0010 0000 — just one bit on: bit 5. On an Arduino Uno, PORTB = 0x20 turns on pin 13's LED. (Fun fact: 0x20 is also the code for a space character.)
0x20 is 32!
Read the voiceover (transcript)
- What is hex two zero in decimal?
- Twenty, thirty-two, sixteen, or two hundred? Comment your answer!
- It's B, thirty-two! In hex, the left digit counts sixteens.
- Two sixteens plus zero ones is thirty-two. In binary, that's just bit five!
- Hex two zero is thirty-two!
- Next quiz: which wire is earth? Follow for more!
Related lessons
// NEWSLETTER · FREE
Get new lessons + early access to the full course
One email when new lessons drop. No spam, unsubscribe any time.
✓ You're on the list! We'll email you when new lessons drop.
By joining you agree to the privacy policy.