Long time no see, North America 2026. SIG Quant OA is finally here! This test is really the same as it has been for years: 1 hour, 17 questions, with a full mix of logic, probability, quick calculations, and brain teasers. Recently I have accompanied the students to do several rounds, and found that the question bank is still stable, but the details will still have some small changes. Overall feeling: fast-paced and tight, the test is not about knowledge, but logical agility and reaction speed.
SIG Quant OA High Frequency Question Summary
| typology | Title Style | difficulty | suggestion |
|---|---|---|---|
| Logic Puzzles | Who's telling the truth and who's telling lies / Seating Arrangement | Conditional redundancy | Table building or code method |
| Probability | Cards, Dice, Coin Toss | joint probability calculation (JPC) | Scenarios / Remainder method |
| Mental Math | Multiplying and dividing large numbers / comparing fractions | time constraint | Squared difference, approximation method |
| Sequences | Finding patterns in number sequences | Easily sidetracked. | verification by substitution (math.) |
SIG Quant Online Assessment 真题分享
Question 1.
You walk into a barn and see a collection of spiders, chickens, and cows. You notice that there are 520 legs in total. The number of chickens is twice the number of cows and the number of spiders is twice the number of chickens. You notice that there are 520 legs in total. The number of chickens is twice the number of cows and the number of spiders is twice the number of chickens.
Question 2.
I need to seat 5 toddlers (Anna, Brian, Charlie, Dixie, Eva) at a round table with these rules.
i) Anna won't sit next to Brian or Eva.
ii) Brian won't sit next to Charlie.
iii) Dixie won't sit next to Eva or Charlie.
If Dixie is sitting to the left of Anna, who is sitting to the left of Bri.
Question 3.
1000 people were surveyed about their preferred method of exercise. The table shows results by age group.
If you meet a 33-year-old who took the survey, compute the probability she prefers swimming.
| – | 18 – 22 | 23 – 27 | 28 – 32 | 33 – 37 | T |
|---|---|---|---|---|---|
| Run | 54 | 40 | 42 | 66 | 2 |
| Bike | 77 | 68 | 90 | 70 | 3 |
| Swim | 28 | 43 | 50 | 52 | 1 |
| Other | 90 | 78 | 71 | 81 | 3 |
| Total | 249 | 229 | 253 | 269 | 1 |
Question 4
Compute the weight of the green triangle in pounds if the following system is balanced and weighs 96 pounds in total.
[There is an image of a balanced system labeled "96 lbs" with various shapes.]
Question 5.
Factory A makes 40% red widgets and 60% black widgets. Factory B makes 80% red widgets and 20% black widgets. Two widgets are sampled uniformly at random from one of the companies also selected uniformly at random. Factory B makes 80% red widgets and 20% black widgets. Two widgets are sampled uniformly at random from one of the companies, also selected uniformly at random. Compute the probability they were from Factory A.
Question 6.
You roll three fair 6-sided dice. If they all show the same number, you earn $20. If exactly two of the numbers are the same, you earn $10. If all of the numbers are different, you lose $2. Compute your expected return per roll in dollars. If exactly two of the numbers are the same, you earn $10. If all of the numbers are different, you lose $2. Compute your expected return per roll in dollars. (Round to the nearest cent.)
Exclusive assists, no longer alone to carry hard
SIG Quant OA is really a test of the state of the field: logic around the head, probability questions time is tight, mental arithmetic and can not be wrong. Many students have obviously brushed a lot of questions, the actual battle is still stuck in the rhythm.
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With this kind of support, you are like having an extra invisible teammate, and your rhythm and mindset can be stabilized. In this way, not only can you get high scores in SIG OA, but you will also be more comfortable facing the tests of other quant firms such as IMC and Optiver.
