Quantitative Aptitude - Arithmetic Ability Questions

From the top of a platform 7 m high, the angle of elevation of a tower was 30 deg. If the platform was positioned 50√3 m away from the tower, how tall was the tower?

What will come in the place of the question mark (?) in the following number series?305, 338, 404, 503, 635 , (?)

By what least number should 1200 be multiplied so that it becomes a perfect square?

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

P + Q = 2(P-Q). If Q = 10, what is the value of P?

ΔABC is right angled at B. If m∠A = 60 deg, then find the value of (secC + 2)

The point of the intersection of three medians is known as the ____________.

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 1:2 and area of ΔABC is 45 sq cm, what is the area (in sq cm) of quadrilateral BDEC?