Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a function?
💡 Hint: Think about how every input value relates uniquely to an output.
Question 2
Easy
Define injective function.
💡 Hint: Focus on the unique output for each input!
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the definition of a bijective function?
- A function that is neither injective nor surjective
- A function that is both injective and surjective
- A function that is only injective
- A function that maps only some elements from A to B
💡 Hint: Think about the definitions of injective and surjective.
Question 2
True or False: Every injective function is surjective.
- True
- False
💡 Hint: Reflect on the definitions of both types of functions.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Prove that the function f(n) = 3n + 2 is bijective.
💡 Hint: Consider how to invert the function.
Question 2
If f and g are functions such that f: A → B and g: B → C, create a composite function and explain its significance.
💡 Hint: Think about what it means to apply one function after the other.
Challenge and get performance evaluation