In a exam, a student scores four marks for every correct answer and loses one mark for every wrong answer. If Rahul attempts all sixty questions and secures 130 marks, the no of questions Rahul attempted correctly is :

Ram and Shyam are travelling from point A to B, which are 60 km apart. Travelling at a certain speed ram takes one hour more than Shyam to reach point B. If Ram doubles his speed he will take 30 minutes less than Shyam to reach point B. At what speed was Ram driving from point A to B ?

Two train of length 100 meter and 80 meter respectively run on parallel lines of rails. When running in the same direction the faster train passed the slower one in 18 second, but when they are running in opposite directions with the same speed as earlier, they pass each other  in 9 seconds. Find the speed of each train.

17 articles were bought for ₹3910 and sold for ₹4590. How much was the approximate profit percentage per article?

The smallest number of five digits exactly divisible by 476

If A = 1300 and B = 1450, then B is approximately what percentage more than A?

A tourist spends daily as many rupees as the number of days of his total tour. If his total expenses were ₹ 361, then how many days did his tour last? 

A solid metallic sphere of radius x cm is melted and then drawn into 126 cones each of radius 3.5 cm and height 3 cm. There is no wastage of material in this process. What is the value of x?