Quantitative Aptitude - Arithmetic Ability Questions

Calculate the value of 61681 x 61681 - 31681 x 3168130000?

The value of x13+x-13x23-1+x-23

An angle is smaller than its supplementary angle by 50°. What is the measure of the angle?

If the successive discounts be 20% , 10% and 5% , then the single equivalent rate of discount is

The average marks in science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?

What should be the missing digit so that the number 347_547 becomes exactly divisible by 11?

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?

The ratio of present ages of P and Q is 5 : 8. Three years later their ages will be in ratio 8 : 11. What is the present age (in years) of Q?