Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 2+2+2+2.......

Calculate the value of 61681x61681-31681x3168130000

If the price of onion increases from Rs 24/kg to Rs 36/kg, then by what percentage a household should decrease the consumption of onion so that
expenditure remains same?

What is the least number of complete years in which a sum of money put out at 40% annual compound interest will be more than trebled?

A company, at the time of inflation reduced the staff in the ratio 5 : 3 and average salary per employee is increased in the ratio 7 : 8. By doing so, the company saved Rs 55000. What was the initial expenditure (in Rs) of company?

In the following question, select the odd word pair from the given alternatives.

S and T can finish a work in 50 days. They worked together for 20 days and then left. How much of the work is left?

The marked price of an article is 10/7 of the cost price and the selling price of that article is 4/5 of the marked price. What is the profit percentage?