MCQ Practice Mathematics 📖 A third of Karim’s marks is Mathematics exceeds a half of his marks in Social Studies by 30, if Karim got 240 marks in two su... Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up PreviousA student first reduced a number by 20 percent and then increased it again by 20 percent. If the difference between the two n... NextA two-digit number has 3 in its unit digit. The sum of its digits is one-seventh of the number itself. What is the number?