In an examination,a student gets 5 marks for every right answer and loses 2 marks for every wrong answer.If he answers 50 questions and get 124 marks, how many are correct answers he attempted?
A teacher gave a student the task of adding āNā natural numbers starting from 1. After a while, the student reported his result as 700. The teacher replied that his result was wrong. The student realized that
he had added one number twice by mistake. Find the sum of the digits of the number which the student had added twice.
white and black Birds r sitting in a telephone wire.At least one from white and one from black.Color must repeat after every 4 and 7 birds. What is the max no of arrangement.
The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
S. Gudder
There is something I don't understand about algebra: It has been around for thousands of years, yet no one has ever found out what the value of "x" or "y" really is.