Quantitative Aptitude - Arithmetic Ability Questions

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

What is the simplified value of sec4θ – sec2θ tan2θ?

Coefficient of x2in (x + 9)(6 - 4x)(4x - 7) is

874.96 + 94.0091 × 34.98 –1244.98 = ?

A retailer gets a discount of 40% on the printed price of an article. The retailer sells it at the printed price. His gain percent is

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

If sin π/6 + sec π/6 = x, then x is

Δ DEF is right angled at E. If m∠F = 45°, then what is the value of 2 Sin F x Cot F?