CBSE - Aptitude Mathematics

Standard deviation for the following data 52,60,60,64,72,96 is equal to 1.14,12 2.1.32 3.132 4.13.8

The area of the floor of a rectangular room is 10 sq.m. and height 4 meters. What is the volume of air in that room ? 1. 14 meters 2. 40 cubic meters 3. 14 cubic meters 4. 14 sq.metres

The simple interest on a sum of money is 1/9th of the principal and the number of years is equal to the rate per cent. The rate of interest per annum is 1. 9% 2. 4 1/2% 3. 3 1/3% 4. 3%

If Shiela purchased 11 books for Rs.10 and sold -10 books for Rs. 11, the percentage of profit is : 1) 21% 2) 100% 3) 10% 4) 11%

If there is change in the grouping of numbers, their sum is 1. not affected 2. affected 3. mostly affected 4. partly affected