Quantitative Aptitude - Arithmetic Ability Questions

A train crossed a 140 m long platform in 15 seconds and a 180 m long platform in 17 seconds. The speed of the train was

For what sum will the simple interest at R% for 2 years will be R?

Find the odd word/letters/number from the given alternatives.

If cosx.cosy + sinx.siny = -1 then cosx + cosy is

If x2 – 4x + 1 = 0, then what is the value of x9 + x7 – 194x5 – 194x3?

What is the reflection of the point (3,-5) in the origin?

If 1/6 of x - 7/2 of 3/7 equals - 7/4, then the value of x is

A kite is flying in the sky. The length of string between a point on the ground and kite is 420 m. The angle of elevation of string with the ground is 30 deg. Assuming that there is no slack in the string, then what is the height (in metres) of the kite?