Quantitative Aptitude - Arithmetic Ability Questions

In the given series of numbers how many 7's are there which are immediately followed by 9 and immediately not preceeded by 5 ?

If x - y = 6 and xy = 40, then find x2 + y2 ?

If sinA = x, then x is equal to

In a mixture of milk and water, there is 19% milk. If the quantity of milk in the mixture is 437 mililitres, then what is the total quantity (in millilitres) of mixture?

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

The perimeter and the length of one of the diagonals of a rhombus is 34 cm and 8 cm respectively. Find the length of its other diagonal (in cm).

The mean of 10 observations is 13. Two more observations are included and the new mean becomes 14. The mean of two new observations is

A wholesaler sells a watch to a retailer at a gain of 20% and the retailer sells it to a customer at a loss of 10%. If the customer pays Rs 874.8, what had it cost the wholesaler?