Quantitative Aptitude - Arithmetic Ability Questions

Two students appeared for an examination. One of them secured 26 marks more than the other and his marks were 75% of the sum of their marks. The marks obtained by them are

Three triangles are marked out of a bigger triangle at the three vertices such that each side of each of the smaller triangles is one-fourth as long as each corresponding side of the bigger triangle. The ratio of the area of the three small triangles taken together to that of the rest of the bigger triangle is

If the angles of a triangle are in the ratio of 1 : 4 : 7, then find the ratio of the greatest angle to the smallest angle.

What is the value of cos 4π/3?

Find the value of 27a3 + 1a3, if 9a2 + 1a2 = 43

Find the value of 64344?

If Cot θ = 21/20, then what is the value of Cosec θ?

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