Quantitative Ap...

When the arrangements of a two-digit number are interchanged, then the number that occurs is smaller than the original number by 27. The ratio of the digits of the number is 2 : 1. Determine the original number?

A mixture of wheat is sold at Rs. 6 per kg. This mixture contains wheat qualities of prices Rs. 4.5 per kg and Rs. 5.3 per kg. For a profit of 20%, what should be the ratio of cheaper quality to costlier quality of wheat?

In a group of junior basketball players, the average weight of boys is 65.9 kg and the average weight of girls is 57 kg. When the average weight of both boys and girls is 60.3 kg and the total number of boys in the group is 66, then what is the total number of girls in the group?

What are the total sales achieved by the companies M1, M3 and M5 together, in the years 2014 and 2015?

M₆’s total sale for the years 2014 and 2015 is what percent of M₃’s total sales for the same years?

What is the ratio of M2’s total sales for the years 2014 and 2015 to M4’s total sales for the same years?

What are the average sales of all the six automobile companies (in thousand numbers) for the year 2014?

The average sales of companies M1, M3 and M6 in 2014 are what percent of the average sales of companies M1, M2 and M3 in 2015?

The interest on a certain principal P at 12% SI for 4 years is equal to the amount on a principal Q at 11% S.I. for 4 years. Then:

1 . 2 . 3 + 2 . 3 . 4 + 3 . 4 . 5 + ………………. + n (n + 1) (n + 2) is the same as :