Quantitative Aptitude - Arithmetic Ability Questions

ΔGHI is similar to ΔKLM. If the ratio of Perimeter of Δ GHI : Perimeter of ΔKLM = 1:4, and length of GH is 2 cm, what is the length of the corresponding side KL?

If the length of one side and the diagonal of a rectangle are 5 cm and 13 cm respectively, then find its perimeter (in cm).

If the standard deviation of a population is 6.5, what would be the population variance?

At 6% simple interest per annum a sum of money became Rs. 834 in 6.5 years. The sum initially invested was

Three solid spheres of radius 3 cm, 4 cm and 5 cm are melted and recasted into a solid sphere. What will be the percentage decrease in the surface area?

The mean of marks secured by 35 students in division A of class X is 65, 45 students of division B is 61 and that of 70 students of division C is 59. What is the mean of marks of the students of three divisions of Class X?

Rashika can do a work in 5 days. Rashmi can do the same work in 7 days. Both of them finish the work together and they get Rs 240 for the work. What isthe share (in Rs) of Rashika?

Shivam is 10% less efficient than Vivek. If Vivek can make a helmet in 9 days, then in how many days Shivam can complete the same work?