Quantitative Aptitude - Arithmetic Ability Questions

Which of the following equations has 3 as a root?

A student, by mistake, wrote 64 in place of 46 as a number at the time of finding the average of 10 given numbers & got the average as 50. The correct average of the numbers is

By selling a used phone for Rs.6,160 Rajan got 44% less than what it cost him to buy it a few years ago. At what price should Rajan have been able to sell it to make a profit of 5%?

What sum will produce the same interest in 9 years at the rate 8% simple interest as Rs. 800 producein 3 years at 9/2% per annum?

What are the co­-ordinates of the mid point of the segment joining points C(0,­-3) and D(8,5)?

Select the odd word/letters/number/number pair from the given alternatives.

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

Calculate the principal if an amount of Rs. 441 is received on compound interest at the rate of 5% per annum after 2 years.