Quantitative Aptitude - Arithmetic Ability Questions

If 1+y16-74, then the value of 5y-15

If (secA - tanA)2 = x, then the value of x is

The mean of the data 1, 1/2, 1/2, 3/4, 1/4, 2, 1/2, 1/4, 3/4 is

A boy crosses a 300 metres wide road in 30 seconds. What is his speed (in km/hr)?

A balloon leaves from a point P rises at a uniform speed. After 6 minutes, an observer situated at a distance of 450√3 metres from point P observes that angle of elevation of the balloon is 60 deg. Assume that point of observation and point P are on the same level. What is the speed (in m/s) of the balloon?

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

If 3x + 2 < 2x + 1 and x ­- 4 ≤ 2x -­ 1; then x can take which of the following values?

The distance between the points (11,­5) and (k,0) is 13. Find k.