Top 25 Programming Puzzles and Brain Teasers

Below is the list of commonly asked programming puzzles in a technical interviews –


  1. Clock angle problem – Find angle between hour and minute hand
  2. Add two numbers without using addition operator | 4 methods
  3. Implement power function without using multiplication and division operators
  4. Print all numbers between 1 to N without using semicolon
  5. Swap two numbers without using third variable | 5 methods
  6. Determine the if condition to print specific output
  7. Find maximum, minimum of three numbers without using conditional statement and ternary operator | 4 methods
  8. Find numbers represented as sum of two cubes for two different pairs
  9. Print “Hello World” with empty main() function | 3 methods
  10. Print all numbers between 1 to N without using any loop | 4 methods
  11. Print a semicolon without using semicolon anywhere in the program
  12. Multiply two numbers without using multiplication operator or loops
  13. Find square of a number without using multiplication and division operator | 3 methods
  14. Find if a number is even or odd without using any conditional statement
  15. Set both elements of a binary array to 0 in single line
  16. Find minimum number without using conditional statement or ternary operator
  17. Perform Division of two numbers without using division operator
  18. Generate 0 and 1 with 75% and 25% Probability
  19. Generate Desired Random Numbers With Equal Probability
  20. Return 0, 1 and 2 with equal Probability using the specified function
  21. Generate Fair Results from a Biased Coin
  22. Generate numbers from 1 to 7 with equal probability using specified function
  23. Implement Ternary Operator Without Using Conditional Expressions
  24. Determine if two integers are equal without using comparison and arithmetic operators
  25. Return 0 and 1 with equal Probability using the specified function


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