Quantitative Aptitude - Arithmetic Ability Questions

If (23)2= 4x then 3x is equal to

If sec 300° = x, then value of x is

The average marks of 40 students in an examination was 34. It was later found that the marks of one student had been wrongly entered as 62 instead of 26. what is the correct average?

A farmer travelled a distance of 61 km in 9 hours. He travelled partly on foot at a speed of 4 km/hour and partly on bicycle at a speed of 9 km/hour . The distance travelled on foot is

The brother is elder to his sister by 6 years. Seven years ago the product of their ages was 72. What is the age of the brother?

If x3 – y3 = 81 and x – y = 3, then what is the value of x2 + y2?

To travel 708 km, an Express train takes 6 hours more than Rajdhani train. If however, the speed of the Express train is doubled, it takes 3 hours less than Rajdhani train. What is the speed of Rajdhani train?

If a merchant offers a discount of 20% on the list price, then he makes a loss of 10%. What % profit or % loss will she make if he sells at a discount of 5% of the list price?