Fermi Answers Today
Editorially verified for the Oct 9, 2026
Question 1 of 3
How many days does a container ship take to sail from Shanghai to Rotterdam through the Suez Canal?
30 days
Question 2 of 3
How many wild elephants lived in Africa at the last full continent-wide count, published in 2016?
415,000 elephants
Question 3 of 3
How many Oreo cookies are sold around the world each day?
164,000,000 Oreos
164 million Oreos
Today's Fermi is puzzle #75, out on Friday, October 9, 2026. Each card above shows the answer the game published. Tap a question for its own page, where the napkin math and the source are laid out step by step.
Below the answer table you'll find the range of guesses that scores 2× or better on each question, followed by a plain guide to how Fermi scores a day.
Today's Fermi answers
The answers for Fermi #75. Each question links to its full working.
Fermi #75 answers
| Question | Answer |
|---|---|
| 1. How many days does a container ship take to sail from Shanghai to Rotterdam through the Suez Canal? | 30 days |
| 2. How many wild elephants lived in Africa at the last full continent-wide count, published in 2016? | 415,000 elephants |
| 3. How many Oreo cookies are sold around the world each day? | 164,000,000 Oreos |
The 2× window
| Question | Guesses that score 2× or better |
|---|---|
| Question 1 | 15 to 60 days |
| Question 2 | 208,000 to 830,000 elephants |
| Question 3 | 82 million to 328 million Oreos |
Fermi treats a low miss and a high miss alike, so half the answer and double the answer both come out at 2×.
How the napkin math would have scored
Lock in a guess and Fermi shows its own rough route to the answer, built from a few figures anyone could reach without searching. Here is how each route would have done if you had typed its result in as your guess.
| Napkin math lands on | Score as a guess |
|---|---|
| Question 1: ≈ 29 days | 1.03×, Too Low |
| Question 2: ≈ 350,000 | 1.19×, Too Low |
| Question 3: ≈ 200,000,000 | 1.22×, Too High |
Played as a full set of guesses, those routes would have made a 1.14× day. The day score uses Fermi's geometric average, which is explained further down.
How to play Fermi
Three questions, one guess on each, and no looking anything up. The game does let you use a calculator and a scratch pad, and both are built in. A fresh puzzle goes live at midnight Eastern time.
| Rule | What it means |
|---|---|
| Three questions | Every player gets the same set in the same order. Each asks for a number you aren't expected to know offhand. |
| One guess each | Type a number and lock it in. There is no second try on that question. |
| The reveal | The answer comes back tagged Too High, Too Low or Spot On. You also see the share of players you were closer than, a chart of everyone's guesses and a napkin-math route to the figure. |
| Scored as a multiple | The bigger of your guess and the answer is divided by the smaller. Exact is 1×. Off by double, or by half, is 2×. Lower is better. |
| Day score | Your three multiples are averaged on a multiplicative scale, so one wild miss costs less than it would in a plain average. |
| Reset | Midnight in New York: 04:00 UTC while US daylight saving time is on, 05:00 UTC the rest of the year. |
Tips for a closer Fermi guess
- Start from a number you trust. A city's population, the length of a film or the size of a soda can makes a better first step than a blind guess, and you adjust from there.
- Most of the rest is a chain of multiplications: a rate times a duration, or a count times a size. Put each factor in the scratch pad so the shaky one is easy to spot.
- Round without guilt. 365 days can be 400 and 86,400 seconds can be 100,000. A few percent here and there barely moves a score that counts in multiples.
- When you're torn between two bounds, split them by multiplying. Say the answer is somewhere from 100 to 10,000: guess 1,000, and anywhere in that range you score 10× or better. Guess 5,000 instead and a true answer of 100 costs you 50×.
- Read the fine print under the question. A year, a place or a phrase like "per side" changes which number is wanted. If feet and gallons slow you down, switch the game to Metric and the answers convert too.
- Before you lock in, ask whether the guess could be ten times too big or too small. Catching that one mistake is worth more than polishing the last digit.
How Fermi averages a day
Fermi's help page says the day score is the average of your three. It's a geometric average: multiply the three multiples together and take the cube root. Next to a plain average, it looks like this.
| Your three scores | Plain average | Fermi day score |
|---|---|---|
| 1×, 2×, 4× | 2.33× | 2.00× |
| 2×, 2×, 2× | 2.00× | 2.00× |
| 1.5×, 3×, 10× | 4.83× | 3.56× |
| 1×, 1×, 100× | 34.0× | 4.64× |
No single question counts for more than 1,000×, so two perfect guesses and one hopeless one still make a 10.0× day.
Fermi leaderboard tabs
You need an account and a username to be listed. Pick a badge as well, and your plays also count for that badge's team.
| Tab | What it ranks | To appear |
|---|---|---|
| Today | Top scores on today's puzzle | Play today's puzzle |
| 7 days | Average over the last 7 puzzles | Play at least 3 of them |
| All time | Average over every puzzle, weighted by how many you've played | Play at least 10 |
| Streaks | Longest current runs of daily play | Only puzzles played on their own day count. Archive replays still feed your personal streak. |
| Badges | Which badge has the best average over the last 7 days, counting every play by everyone wearing it | 10 plays from the badge across those 7 puzzles |
What is Fermi?
Fermi is a daily estimation game at fermi.gg. Every question has a real, sourced answer you could not know offhand, like how many piano tuners work in New York City. The game sums up its rules as "No Googling." Napkin math and gut instinct are allowed, along with the built-in calculator. You're trying to get close, not exact.
It's named after Enrico Fermi, the physicist famous for quick estimates made with almost no data. At the Trinity test on July 16, 1945, he dropped scraps of paper as the blast wave passed, watched how far they drifted, and put the yield at about 10 kilotons. The accepted figure is roughly 21 kilotons, so by this game's rules he would have scored 2.1×.
Fermi comes from Flatwhite Studios, a small studio that makes daily pop culture and trivia games. Its other titles are the music guessing game Spotle, the film version Spotle Movies and the music crossword Crosstune. If you play Spotle as well, there are Spotle hints for today on this site. Fermi puzzle #1 came out on July 27, 2026. Answers here start with #74 on October 8, 2026.
Frequently asked questions
What are the Fermi answers today?
Fermi #75, October 9, 2026, has three questions. The answers are 30 days (question 1), 415,000 elephants (question 2), and 164,000,000 Oreos (question 3).
What number Fermi is today?
Today's puzzle is Fermi #75. Puzzle #1 went live on July 27, 2026, and the number goes up by one each day.
When does Fermi reset?
Every night at midnight New York time. That's 04:00 UTC while US daylight saving time is in effect and 05:00 UTC for the rest of the year.
How does Fermi scoring work?
Each guess turns into a multiple: the larger of your guess and the answer, divided by the smaller. Exact is 1×, off by double or by half is 2×, and ten times off is 10×. The three multiples are then combined with a geometric average (multiply them, take the cube root) to give the day score. Lower is better.
Is guessing too high worse than guessing too low in Fermi?
No. The score only measures how many times off you were. If the answer is 100, a guess of 200 scores 2× and so does a guess of 50.
Can you use a calculator in Fermi?
Yes, there's one built into the game, next to a scratch pad for notes. What the game asks is that you don't look the answer up.
Can I play old Fermi puzzles?
Yes. The archive in the fermi.gg side menu goes back to puzzle #1 on July 27, 2026. Replays count toward your personal streak, but the Streaks leaderboard only counts puzzles played on their own day. Answers on this site begin with October 8, 2026.
Can I submit a Fermi question?
Yes, through the Submit a question link in the game's menu. Every submission is reviewed, and details about where the number comes from make a question easier to use.
Who makes Fermi?
Flatwhite Studios, a small studio behind a handful of daily pop culture and trivia games. Spotle, Spotle Movies and Crosstune are theirs too, and one username works across all of them.
What is a Fermi question?
A question with a numeric answer that nobody expects you to know, like the number of piano tuners in a big city. You estimate it by breaking it into smaller guesses and multiplying them. Landing in the right order of magnitude is the goal.
Where do these Fermi answers come from?
From the puzzle fermi.gg publishes for each date, including its napkin math and source notes. Scores shown on this page use the game's own scoring rule. Other estimation games also go by Fermi; this page covers the three-question game at fermi.gg, so answers for those won't match.
Where can I play Fermi?
In any web browser at fermi.gg. It's free, and you can play without an account. Signing in adds the leaderboard, the stats page and your history on every device.