Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd letters from the given alternatives.

If tanθ = 815, then 1-sinθ1+sinθ is

Given: 5x -3(2x-7) > 3x - 1 < 7 + 4x; then x can take which of the following values?

If x + 1x = 3, then x18 + x12 + x6 + 1 value is

What is the reflection of the point (-1 , 5) in the line x = 1?

If sec θ (cos θ + sin θ) = √2, then what is the value of (2 sin θ)/(cos θ – sin θ)?

If cos 2π/3c = x, then the value of x is

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