Quantitative Aptitude - Arithmetic Ability Questions

If a2b+c=b2C+a=a2a+b=1 then 11+a+11+b+11+c is

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?

According to the will the wealth of Rs 21,25,000 was to be divided between the son and the daughter in the ratio 7/6 : 5/3. How much did the son get (in Rs)?

The population of a town is 350000. It increases annually at the rate of 20%. What will be the population after 2 years?

What is the HCF (highest common factor) of 57 and 513?

Akash starts a business with Rs 85000 and Payal joins him with Rs 102000. If the profit at the end of a year is divided in the ratio 1 : 1, then after how many months did Payal join Akash?

The sum of money that will yield Rs. 60 as simple interest at 6% per annum in 5 years is

Rs. 750 invested for 3 months gave an interest of Rs. 18. What was the simple rate of interest per annum?