For the following questions answer them individually
Present age of a father is 3 times the present age of his son. 4 years later father’s age is 13 more than 2 times of his son’s age. What is present age of father?
A person bought an article on 40% discount and sold it at 50% more than the marked price. What profit did he get?
In a right angled triangle, two sides are of the same length. Which of the options is one of the angles of that triangle?
The price of a book is first increased by 10% and then decreased by 5%, then the net change in the price will be