PPSC Accountant-(2020) Local Government and Community Development, Computer MCQs, PPSC Solved Past Papers MCQsMicrosoft Windows is the great invention of?A. Charles Ranlett Flint B. Paul Allen C. Bill Gates D. Both B & C Ali is twice as old as his youngest brother if the difference between their ages is 15 years. how old is his youngest brother?Who was the first woman travel into space?