Python
Problem 1: Calculator Using Class A calculator that performs addition, subtraction, multiplication, and division using a class-based approach.
Problem 2: Generate Odd Number Series Given an integer a, generate the first a odd numbers.
Problem 3: Conditional Odd Number Series If a is odd, generate a odd numbers; if even, generate a-1 odd numbers.
Problem 4: Count Multiples Count how many numbers in a list are divisible by numbers from 1 to 9