Quantitative Aptitude - Arithmetic Ability Questions

If A : B = 3 : 4 and B : C = 6 : 5 then A : (A + C) is

∆XYZ is right angled at Y. If tanX = 15/8, then what is the value of sinZ ?

Length of the sides of a triangle are a, b, c respectively. If a2 + b2 + c2 = ab +bc + ca then the triangle is

Total surface area of a cube is 486 sq cm, find sum of length of all its edges?

X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?

A person borrows some money for 8 years at a rate of simple interest. If the ratio of principal and total interest is 5 : 8, then what is the rate ( inpercentage) of interest?

Slit 69 into three parts such that they are in A.P. and the product of their smaller parts is 483.

If a2+1=9a, (a≠0) then the value of a2+1a2 is