Quantitative Aptitude - Arithmetic Ability Questions

A boat covers 143 km upstream in 13 hours and the same distance downstream in 11 hours. What is the speed (in km/hr) of the boat in still water?

If tanθ = 815, then 1-sinθ1+sinθ is

If 4x - 5y = -37 and 7x + y = -16, then x - y = ______

After 10 innings the average score per innings of a batsman was 52. After 12 innings the average rose to 54. If the batsman had scored 16 more runs in the 12th innings than in the previous one, how many runs did he score in the 11th innings?

If 192 pens cost is Rs.10, how many pens can be bought for Rs.5?

If (36 - 16x) - (4x - 8) = 4, then the value of x is

What is the area (in sq cm) of a rhombus if the lengths of the diagonals are 12 cm and 14 cm?

Compute : 1112 / 139 - 5