Problem 1. Odd or Even Integers

Problem 2. Gravitation on the Moon

Problem 3. Divide by 7 and 5

Problem 4. Reactangles

Problem 5. Third digit is 7?

Problem 6. Four-Digit Number

Problem 7. Point in a Circle

Problem 8. Prime Number Check NEW*

Problem 9. Trapezoids

Problem 10. Point Inside a Circle & Outside of a Rectangle

Problem 11. Bitwise: Extract Bit #3

Problem 12. Extract Bit from Integer

Problem 13. Check a Bit at Given Position

Problem 14. Modify a Bit at Given Position

Problem 15.* Bits Exchange

Problem 16.** Bit Exchange (Advanced)