Question for:
There are many different types of screw driver shapes that are used for different purposes, many for increased torque and others for security or safety. The common Phillips head screw, for instance, uses a socket in the shape of a cross. What is the shape of the socket for a Robertson screw? The Robertson screw was invented in 1906 and received its Canadian patent in 1907. It is widely favored in woodworking, general construction, and electrical work.
Clues
Possible QScores
100
72.87
33.3
22.07
Answer Breakdown
| Clues Used | |||||
|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | Total | |
| Submissions | 67 | 99 | 127 | 35 | 328 |
| % of Total | 20.43% | 30.18% | 38.72% | 10.67% | |
| Clues Used | |||||
| 0 | 1 | 2 | 3 | Total | |
| Correct | 38 | 89 | 126 | 33 | 286 |
| % of Correct | 13.29% | 31.12% | 44.06% | 11.54% | |
| % of Answers | 11.59% | 27.13% | 38.41% | 10.06% | |
| Clues Used | |||||
| 0 | 1 | 2 | 3 | Total | |
| Incorrect | 29 | 10 | 1 | 2 | 42 |
| % of Incorrect | 69.05% | 23.81% | 2.38% | 4.76% | |
| % of Answers | 8.84% | 3.05% | 0.3% | 0.61% | |
87.2%
12.8%
79.57%
Most Common Incorrect Answer
| Answer | Count |
|---|---|
| “Star” | 13 |