久等了，北美 2026 SIG Quant OA 終於來了！ 這套測試真的是萬年不變：1 小時，17 道題，邏輯、概率、速算、腦筋急轉彎全混合。 最近我已經陪著學員做了好幾輪，發現題庫依舊穩定，但細節還是會有一些小變化。 整體感覺：節奏快、時間緊，考的不是知識點，而是邏輯敏捷度和反應速度。
SIG Quant OA 高频题型总结
| 類型 | 題目風格 | 難點 | 建議 |
|---|---|---|---|
| Logic Puzzles | 誰說真誰說假 / 座位排列 | 條件冗餘 | 建表 or 代號法 |
| Probability | Cards, Dice, Coin Toss | 聯合概率計算 | 分情景 / 餘數法 |
| Mental Math | 大數乘除 / 分數比較 | 時間緊 | 平方差、近似法 |
| Sequences | 數列找規律 | 容易想偏 | 代入驗證 |
SIG Quant Online Assessment 真題分享
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 thenumber of cows and the number of spiders is twice the number of chickens. Compute the number of spiders.
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 sampleduniformly at random from one of the companies, also selected uniformly at random. The widgets are both red. Compute the probability they were from FactoryA.
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 thenumbers are different, you lose $2. Compute your expected return per roll in dollars. (Round to the nearest cent.)
專屬助攻，不再一個人硬扛
SIG Quant OA 真的很考驗臨場狀態：邏輯繞得人頭大，概率題時間緊，心算又不能出錯。 很多同學明明刷過不少題，實戰還是被卡在節奏上。
Programhelp提供的就是专属远程面试助攻服务：
无痕面试辅助，实时共享文档，提前调试设备；
即時語音提醒，帮你在面试中实时语音提醒，不会在题目上浪费过多时间；
隐形辅助，不卡屏、不留痕，确保安全稳定。
有了這種支援，你就像多了個隱形隊友，節奏和心態都能穩住。 這樣一來，不僅能在 SIG OA 中拿高分，面對 IMC、Optiver 等其他 quant firm 的測試也會更加遊刃有餘。
