Soreno
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Brain teaser practice, timed and scored

Ten puzzles a day on probability, quick math, logic and lateral thinking, the kinds asked in consulting, banking and trading interviews. Every answer comes with the reasoning and what the interviewer is checking.

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Runs in your browser. Nothing you type is saved or sent.

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Ten puzzles, one clock

Say each step out loud as you go, the way you would in the room. Want the classics first? Read the brain teaser guide. For the numbers inside a case, use the case math drills.

A new set

10 brain teasers, about 90 seconds each

Read the puzzle and think it through, out loud if you can. Type your answer and reveal, or tap I'm stuck. You see the answer, the reasoning and what the interviewer is checking, then mark it got it or missed it.

How it works

A set takes about fifteen minutes

A new set of 10 each day from 43 puzzles, with the reasoning after every one, so the ideas stick.

  1. 1

    Start today's set

    Ten puzzles from a pool of 43, two or three each of quick math, probability, logic and lateral thinking. Everyone gets the same set on the same date, or tap New set for a different one.

  2. 2

    Think, then reveal

    A clock shows 90 seconds per teaser, but nothing stops you. Type your answer and reveal it, or tap I'm stuck. You see the answer, the reasoning and what the interviewer is checking, and a number answer is checked for you.

  3. 3

    Score it and share it

    Mark each one got it or missed it. At the end you get your score, your average time and a link that opens the same 10 puzzles for a friend.

Keep going

Learn the ideas, then say them out loud

Read the classic puzzles, drill case math or run a full case with an interviewer who follows up.

FAQ's

Frequently Asked Questions

Everything you need to know about Soreno, answered in one place.

Some do, mostly in trading, quant and some banking interviews, and less often in consulting, where case math does the same job. When they come up, the interviewer cares more about how you reason out loud than about the final answer. Use them to practice structured thinking out loud, not to guess what a given firm will ask.
Repeat the question back, say the assumption you are making and try a small version first. Talk through each step so the interviewer can follow, then check your answer before you say it. If you get stuck, say what you have ruled out. That still shows how you think.
Most of these can be done in a minute or two once you see the idea, which is why the clock shows 90 seconds. It never stops you. Going over is fine while you practice, and the time tells you which kinds of puzzles to drill.
Yes, for everyone on the same date. The set is picked from the date on your device, out of 43 puzzles, and none of today's 10 were in the two sets before it. New set gives you a different 10, and the share link opens exactly the set you played.
When the answer is a number, it reads what you typed, in forms like 1/3, 1 in 3, a third, 33% or forty-five, and tells you if it matches. When the answer is a method, like the jugs or the labels, compare yours with the steps shown and mark it yourself.
No. What you type stays in your browser. The share link only holds the set and your score.

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