Questions Firms Wire Games Tests Arena Daily Stats

Questions/
The Thirteenths Wheel

#984

The Thirteenths Wheel

MediumMental MathPRO

Reported at:Optiver Maven Securities

More Mental Math to train on

Basis Points to Dollars, Instantly
47 × 53 in Two Seconds
Squaring Numbers Ending in 5
18% of 450, No Paper

All Mental Math questions →

← Up 20%, Down 20%Divide by 5, 25, 125 at Sight →

QuantPit

The training ground for quant trading interviews. Rigorous questions, playable market simulations, and the feedback loops that make preparation stick.

Practice

Question Bank
Firm Guides
The Wire
Study Tracks
Daily Challenge
Spaced Review
Mock Interviews

Games & Tests

Market Maker
Card Market
Mental Math Sprint
Sequences Test
Your Stats

QuantPit

Guides
Pricing
Account
Contact
Privacy
Terms

Questions by topic

Probability Expected Value Combinatorics Brainteasers & Logic Market Making & Betting Options & Hedging Statistics Machine Learning Math Foundations Mental Math

Interview guides by firm

Jane Street Optiver SIG Citadel Securities IMC Akuna Capital Flow Traders Jump Trading HRT Two Sigma DRW Five Rings Tower Research XTX Markets G-Research Maven Securities Da Vinci

QuantPit is an independent educational resource. Company tags indicate the style of questions candidates report from interviews at those firms; QuantPit is not affiliated with, endorsed by, or sponsored by any firm mentioned. Nothing here is financial advice.

© 2026 QuantPit. Built for the next generation of traders.