Bracket #5 — the answers

The five questions from October 4, 2026, with their answers, the track each ran on, and the bracket that would have scored 90 on it.

The answers

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.

1. How many bones are in the adult human body? 206 — near the middle of its track. A bracket from 185 to 230 is a tenth of the track and scores 90; the whole track scores 0.
2. How long is the Rio Grande? 1,896 miles — near the middle of its track. A bracket from 1,650 to 2,150 is a tenth of the track and scores 90; the whole track scores 0.
3. How many zeros are in a trillion? 12 — in the lower third of its track. A bracket from 9.5 to 14.5 is a tenth of the track and scores 90; the whole track scores 0.
4. How many seconds are in 3 hours? 10,800 — 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 7,600 to 15,000 is a tenth of the track and scores 90; the whole track scores 0.
5. How long is the Channel Tunnel? 31 miles — in the lower third of its track. A bracket from 26.5 to 36 is a tenth of the track and scores 90; the whole track scores 0.

Previous: Bracket #4 (Sat, Oct 3)

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.