Quantitative Aptitude - Arithmetic Ability Questions

3cosA is equal to

If (cotAcotB - 1) / (cotB + cotA) = x, then the value of x is

In the following question, select the odd word pair from the given alternatives.

If Sin θ = 20/29 , then what is the value of Sec Sin θ ?

What is the reflection of the point (5, -2) in the line x = -1?

If PA and PB are tangents to the circle with centre O such that ∠APB=50°, then the ∠OAB=

A number when divided by the sum of 555 and 445 gives two times their difference as quotient and 30 as the remainder. The number is

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔABC is 98 cm sq, what is the area (in sq cm) of quadrilateral BDEC?