Quantitative Aptitude - Arithmetic Ability Questions

In a class of 50 students there are 27 boys. The average weight of these boys is 72 Kg and average weight of the full class is 55.44 kgs. What is the average weight (in kgs) of the girls of the class?

To cover a distance of 90 km in 2.5 hours what should be the average speed of the car in meters/second?

A man travels 401 kilometres in, partly by rail and partly by steamer. He spends 6 hours more time on steamer. If the velocity of the steamer is 21 km/hr and the velocity of rail is 56 km/hr, how much distance does he cover by steamer?

The area of a square is 40.5 cm². Find the length of its diagonal (in cm).

If 12x = 192- 112, what is the value of x?

If a = √2 + 1 and b = √2 - 1, then the value of 1a+1+1b+1 will be

Select the odd word/letters/number/number pair from the given alternatives.

What will be the net discount (in percentage) for two successive discounts of 30% and 20%?