Eyeball #3 — the answers
The five rounds from October 3, 2026: what each asked, the answer, and the guesses that scored the full 100.
The answers
| # | Round | The answer, and what scored 100 |
|---|---|---|
| 1 | Ratio | ×8.3 100 for ×7.6 to ×9.1 |
| 2 | Meet | where the two lines cross 100 for a tap within 8% of the longer gap |
| 3 | Center | the circle’s center 100 for a tap within 8% of the radius |
| 4 | Path | 7.7 bars 100 for 7.2 to 8.3 bars |
| 5 | Average | 46% of the tallest bar 100 for a line within 3% of the tallest bar’s height |
Round by round
A round scores 100 for a guess within a small margin of the truth and falls in a straight line to 0 for a wild one; the day is the average of the five. The pictures are the game — these are the figures behind them.
- Ratio. By area, the big circle is how many of the small one? The big circle is 2.88 times as wide as the small one, and area goes as the square of the width: 2.88 × 2.88 is 8.3.
- Meet. If these two lines carried on, where would they meet? The lines meet at 56°, after carrying on 0.9 and 0.9 times their drawn lengths.
- Center. This arc is part of a circle. Where is its center? The arc was 163° of its circle, 45% of the way round. The shorter the arc, the less it says about its center.
- Path. The squiggle is how many bars long? The squiggle bends 2 times. End to end in a straight line it spans 3.8 bars; along the curve it is 7.7.
- Average. Where is the average height of these bars? 6 bars, at 57, 100, 36, 13, 53 and 18% of the tallest. Their average is 46%, below the halfway line.
Previous: Eyeball #2 (Fri, Oct 2)
About Eyeball
Eyeball is Noggin’s estimation-by-eye puzzle, on the second shelf: five rounds a day dealt from twelve kinds, one guess each and then the truth drawn over it, outside the daily line-up. How to play Eyeball, or play today’s.