Bracket #13 — the answers
The five questions from October 12, 2026, with their answers, the track each ran on, and the bracket that would have scored 90 on it.
The answers
| # | Question | Answer | Track | A tenth of it, on the answer |
|---|---|---|---|---|
| 1 | How long is the Colorado River? | 1,450 miles | 200 to 5,000 | 1,200 to 1,700 |
| 2 | How many rooms does the White House have? | 132 | 20 to 1,000, logarithmic | 110 to 160 |
| 3 | How many people lived on Earth in the year 1900? | 1.6B | 10M to 100B, logarithmic | 1B to 2.5B |
| 4 | A car averages 44 miles per hour for 2 hours. How far does it go? | 88 miles | 10 to 1,000, logarithmic | 70 to 110 |
| 5 | What is the atomic number of uranium? | 92 | 1 to 118 | 86 to 98 |
Question by question
A question scores 100 minus the bracket’s width as a percentage of the track, if the answer is inside it, and nothing if it is outside. The tenth-of-the-track bracket below is the one a confident player was aiming for.
- How long is the Colorado River? 1,450 miles — in the lower third of its track. A bracket from 1,200 to 1,700 is a tenth of the track and scores 90; the whole track scores 0.
- How many rooms does the White House have? 132 — near the middle of its track (a logarithmic track, so a tenth of it is a tenth of the powers of ten it spans). A bracket from 110 to 160 is a tenth of the track and scores 90; the whole track scores 0.
- How many people lived on Earth in the year 1900? 1.6B — near the middle of its track (a logarithmic track, so a tenth of it is a tenth of the powers of ten it spans). A bracket from 1B to 2.5B is a tenth of the track and scores 90; the whole track scores 0.
- A car averages 44 miles per hour for 2 hours. How far does it go? 88 miles — near the middle of its track (a logarithmic track, so a tenth of it is a tenth of the powers of ten it spans). A bracket from 70 to 110 is a tenth of the track and scores 90; the whole track scores 0.
- What is the atomic number of uranium? 92 — in the upper third of its track. A bracket from 86 to 98 is a tenth of the track and scores 90; the whole track scores 0.
Previous: Bracket #12 (Sun, Oct 11)
About Bracket
Bracket is Noggin’s estimation puzzle, on the second shelf: five questions a day with a number for an answer, bracketed rather than named, outside the daily line-up. How to play Bracket, or play today’s.