In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?

A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:

The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is:

A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

A boat covers a certain distance downstream in 1 hour, while it comes back in 1 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?

Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?

In the following number series how many 9's are there which are preceded by 3 but not followed by 4? 2 3 9 5 1 3 9 6 7 3 9 4 8 9 3 4 9 3 2 3 9 8 3 9 3

In the following numbers series, how many even numbers are immediately preceded by 6 as well as immediately followed by 3? 6 6 5 6 8 3 9 4 3 6 7 3 6 4 3 2 8 6 4 6 8 2 6 6 3

Answer the following based on the sequence of the number given below:3 2 1 1 5 6 4 2 8 9 3 9 1 1 4 8 2 4 2 9 3 3 9 4 2 4 In the above given sequence how many times a number is the square root of the previous number?

What will come in the place of the (?) in the following number series ?

5 14 45 130 (?) 1182

A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:

CGE, RNP, FJH, OKM, IMK, __

Find the wrong number in the series.

1, 2, 6, 15, 31, 56, 91

Find the wrong number in the given series.

8, 27, 125, 343, 1381

Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?

Look at this series: V, VIII, XI, XIV, __, XX, ... What number should fill the blank?

Look at this series: VI, 10, V, 11, __, 12, III, ... What number should fill the blank?

Look at this series: J14, L16, __, P20, R22, ... What number should fill the blank?

Look at this series: U32, V29, , X23, Y20, ... What number should fill the blank?

Look at this series: (1/9), (1/3), 1, ____ , 9, ... What number should fill the blank?

Find the missing number in the following series?

2, 3, 10, 39, ?, 885

Look at this series: XXIV, XX, __, XII, VIII, ... What number should fill the blank?

Look at this series: 0.15, 0.3, ____, 1.2, 2.4, ... What number should fill the blank?

Find the wrong number in the series.

3, 8, 15, 24, 34, 48, 63

Find the next number in the given sequence?

11, 17, 39, 85, ?

In the following number series how many 8's are there which are exactly divisible by the numbers which are preceded and followed by it ? 824517284842282698454832843183

Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is:

In a mixture 60 litres, the ratio of milk and water 2 : 1. If the this ratio is to be 1 : 2, then the quanity of water to be further added is: