Quantitative Aptitude - Arithmetic Ability Questions

A train of length, 245 metres, takes 20 seconds to cross a 355 metres long bridge. How much time (in seconds) will the train take to cross a 390 metres long platform?

What is the perimeter of the sector whose central angle is 60° and radius of the circle is 21 cm?

What is the value of cos 4π/3?

What is the value of 13313 + 729 - 5123

The value of tan(-405°)

Find out the odd word/letters/number pair from the given alternatives

In the given figure, from the point P two tangents PA and PB are drawn to a circle with centre Oand radius 5 cm. From the point O, OC and OD are drawn parallel to PA and PB respectively. If the length of the chord ABis 5 cm, then what is the value (in deg) of COD?

If x3 + y3 + z3 = 3(1 + xyz), P = y + z – x, Q = z + x – y and R = x + y – z, then what is the value of P3 + Q3 + R3 – 3PQR?