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Maths Puzzles Questions with Answers for Competitive Exams

3 years ago 46.1K Views
Q :  

Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, and Pipe C alone can empty the full tank in x hours. All the pipes were opened together at 10:30 a.m, but C was closed at 2:30 p.m. If the tank was full at 8:30 p.m on the same day, then what is the value of x?

(A) 48

(B) 96

(C) 64

(D) 45

Correct Answer : B

Q :  

If  then what is the value of c.

(A) 0.075

(B) 0.75

(C) 0.5

(D) 0.8

Correct Answer : B

Q :  

What will be the total number of pieces if the length of  the rib is cut to 3/4 m length?

(A) 3

(B) 5

(C) 6

(D) 7

Correct Answer : D

Q :  

If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is : 

(A) 4 hr

(B) 7 hr

(C) 2 hr

(D) 3 hr

Correct Answer : A

Q :  

A man can row at a speed of km/hr in still water. If he takes 2 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream (in km/hr) is : 

(A) 2

(B) 2.5

(C) 1

(D) 1.5

Correct Answer : D

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