Eyeball #18 — the answers
The five rounds from October 18, 2026: what each asked, the answer, and the guesses that scored the full 100.
The answers
| # | Round | The answer, and what scored 100 |
|---|---|---|
| 1 | Degrees | 21° 100 for 13° to 29° |
| 2 | Center | the circle’s center 100 for a tap within 10% of the radius |
| 3 | Ratio | ×7.1 100 for ×4.9 to ×10.3 |
| 4 | Share | 36% 100 for 31% to 41% |
| 5 | Average | 53% of the tallest bar 100 for a line within 5% 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.
- Degrees. How many degrees is this angle? The angle drawn was 21°, 69° short of a right angle.
- Center. This arc is part of a circle. Where is its center? The arc was 104° of its circle, 29% of the way round. The shorter the arc, the less it says about its center.
- Ratio. By area, the big circle is how many of the small one? The big circle is 2.66 times as wide as the small one, and area goes as the square of the width: 2.66 × 2.66 is 7.1.
- Share. What percent of the shape is colored? The shape was a four-sided shape, cut by a straight line: 36% of it colored, 64% not.
- Average. Where is the average height of these bars? 6 bars, at 23, 59, 62, 100, 33 and 41% of the tallest. Their average is 53%, above the halfway line.
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About Eyeball
Eyeball is Noggin’s estimation-by-eye puzzle, one of the daily line-up’s four since 17 October 2026: five rounds a day dealt from twelve kinds, one guess each and then the truth drawn over it. How to play Eyeball, or play today’s.