Quantitative Aptitude - Arithmetic Ability Questions

Shrenik switched on a bulb at 2 : 39 : 40 hours and switched it off on the same day at 12 : 30 : 34 hours. For how long was the bulb in switched-on mode?

In a camp 180 students had ration for 20 days. How many students should leave the camp if the ration should last for 25 days?

If 4x - 5y = -37 and 7x + y = -16, then x - y = ______

Raghavendra sells a machine for Rs 43 lakhs at a loss. Had he sold it for Rs 52 lakh, his gain would have been 5 times the former loss. Find the cost price of the machine.

If a retailer offers a discount of 28% on the marked price of his goods and thus ends up selling at cost price, what was the % mark up?

In an army selection process, the ratio of selected to unselected was 3:1. If 60 less had applied and 30 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

The ratio of two numbers is 6 : 11 and their difference is 65. What will be the smaller number among both the numbers?

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?