Quantitative Aptitude - Arithmetic Ability Questions

What is the value 32cos 39sin 51-sin239 + sin251

After buying a toy for Rs. 66, Raghu managed to sell it at a profit of 15%. The selling price of the toy was

A man travelled at 40 kmph. Had he increased his speed by 16 kmph, he would have covered 80 km more in the same time. Find the actual distance travelled?

Alarms from 3 different clocks sound after every 2, 4 and 6 hours, respectively. If the clocks are startedat the same 6 time, how many times do the alarms ring together in 3 days?

How much does one need to add to 2/3 to obtain 3/2?

A, B and C can complete a work in 20, 24 and 30 days respectively. All three of them starts together but after 4 days A leaves the job and B left the job 6days before the work was completed. C completed the remaining work alone. In how many days was the total work completed?

What is the average of 90, 250, 240, 204, and 616?

If cos -4π/3 = x, then the value of x is