Quantitative Aptitude - Arithmetic Ability Questions

Select the odd letters from the given alternatives.

An aeroplane flying horizontally at a height of 3 Km. above the ground is observed at a certain point on earth to subtend an angle of 60°. After 15 sec flight, its angle of elevation is changed to 30°. The speed of the aeroplane (taking √3 = 1.732) is

If cosec 45° - sin 30° = x, then x is

Compute : 28854 / 458 / 9

Simplify 81x2 - 49y29x + 7y

One of the roots of the equation x2 - 4x + k = 0 is x = 3. The other root is

Which of the following numbers is divisible by 12?

ΔABC is isosceles having AB = AC and ∠A = 40°. Bisectors PO and OQ of the exterior angles ∠ABD and ∠ACE formed by producing BC on both sides, meet at O. Then the value of ∠BOC is