Test your logic skills
We've built Oracle Dev Gym to help you strengthen your coding muscles. A core aspect of good programming is logical thinking. So we've created hundreds of quizzes to enhance your analytical skills
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Vie for honours in the weekly logic tournament
Think your logic problem solving skills are world-class?
Every week we publish a new competitive quiz for you to try your hand at. At the end of the week, we score each player on accuracy and speed. You can see how your skills stack up in the leaderboards. These searchable reports show the top-ranked players each week, month, quarter, and year.
At the end of each year, the highest-ranked players complete in the Annual Championships to find out who's the most logical developer
Think you've got what it takes to be the best?
Take free logic quizzes online
Not interested in competing?
Our library has hundreds of quizzes on logical deduction. All free and ready for you whenever you want to practice. These allow you to practice at your own pace.
Here's a sample logic quiz
Sample quiz
The clues presented below (numbered #1 through #3) are in the form of four digits arranged in a square surrounding a fifth digit, like so:
| A | B | |
| E | ||
| C | D |
Each clue uses the same algorithm to compute E. Mark a choice as correct if its integer can replace E.
The following rules apply to this algorithm:
1. Each digit must be used once and only once. For example: "A * (A + B) / C" is not a valid algorithm. Neither is simply "A + B".
2. A, B, C, D and E must be positive integers. 3. No numbers may be used in the algorithm other than those corresponding to the letters in each square. For example, " (A * (D - 3)) + (C / B) " is not a valid algorithm. 4. Parentheses are allowed in the algorithm.
5. The only valid mathematical operations are multiplication (*), division (/), addition (+), and subtraction (-).
The Clues
| #1 | #2 | #3 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 12 | 11 | 9 | 7 | 14 | |||||
| 76 | 95 | E | ||||||||
| 7 | 6 | 2 | 18 | 8 | 23 |
Note: More than one algorithm might fit all the clues, but only one possible solution for E will be found in the choices below. Remember: one and only one choice is correct.
Choices - Select all that apply.
Choice 1
65
Choice 2
34
Choice 3
41
Choice 4
31
Choice 5
72
No Choice Correct (Collapsible)
Train with free workouts
Like physical exercise, regular training is key to peak performance. To help with this, we've built workouts to stretch your logical deduction skills.
Along with our hand-crafted workouts, you can build your own around. This enables you to keep your analytical muscles in shape.
Our top workouts
Coding Requires Logic
Developers Love Logic
Logic - the Heart of Programming
Join the gym!
Oracle Dev Gym also has a library of thousands of quizzes on Oracle Database development. These cover SQL, PL/SQL, and database design. Every weeek there's a new competitive quiz on Oracle Database development.
Join today and get training!