Quantitative Aptitude - Arithmetic Ability Questions

What number, from the following should be deducted from 1184 to make it exactly divisible by 21?

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.

The height of a tower is 50√3 m. The angle of elevation of a tower from a distance 50 m from its feet is

If A alone can do a job in 40 days then, in how many days can B alone do the job if together they can do the job in 8 days?

A businessman imported Laptops, worth Rs 210000, Mobile phones worth Rs 100000 and Television sets worth Rs 150000. He had to pay 10% duty on laptops, 8% on Phones and 5% on Television sets as a special case. How much total duty (in Rupees) he had to pay on all items as per above details?

The ratio between the weights of gold and silver in an alloy is 17:3. If the weight of silver in the alloy is 2.7 gm, find the weight of gold in the alloy?

X attempts 94 questions and gets 141 marks. If for every correct answer 4 marks is given, and for every wrong answer 1 mark is deducted, then the number of questions wrongly answered by X is __.

A balloon leaves from a point P rises at a uniform speed. After 6 minutes, an observer situated at a distance of 450√3 metres from point P observes that angle of elevation of the balloon is 60 deg. Assume that point of observation and point P are on the same level. What is the speed (in m/s) of the balloon?