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Mathematical Series Questions for Competitive Exams

5 months ago 155.7K Views
Q :  

Simplification the following equations

(A) 2955.5

(B) 2905.5

(C) 2590.5

(D) 2905.5

(E) None of these

Correct Answer : B

Q :  

The smallest positive integer when multiplied by 392, the product is a perfect square, is 

(A) 6

(B) 5

(C) 3

(D) 2

Correct Answer : D

Q :  

Simplification the following equations shown below

(A) 1512

(B) 1521

(C) 1251

(D) 1531

(E) None of these

Correct Answer : B

Q :  

What approximate value should come at place of the question mark(?) in the following question?

(A) 8

(B) 38

(C) 58

(D) 68

(E) 18

Correct Answer : E

Q :  

What approximate value should come in place of the question mark(?) in the following question.
635×455÷403=?

(A) 735

(B) 795

(C) 695

(D) 685

(E) 715

Correct Answer : E

Q :  A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is:

(A) 2.5 km/hr

(B) 2.4 km/hr

(C) 6 km/hr

(D) 5.2 km/hr

Correct Answer : A
Explanation :

Let man speed =x km/hr

stream of speed= y km/hr

x-y=8 upstream

x+y=13 downstream

solving it i get y = 2.5 km/hr


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

(A) 2

(B) 4

(C) 8

(D) 9

Correct Answer : C

Q :  A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

(A) 3 hours

(B) 5 hours

(C) 4 hours

(D) 8 hours

Correct Answer : C
Explanation :

x=13 km/hr, y=4 km/hr

x+y=17 km/hr

Total Distance=68 km

Total Time=68/17=4 hours


Q :  A man can row three-quarters of a kilometer against the stream in 45/4 minutes. The speed (in km/hr) of the man in still water is:

(A) 2

(B) 10

(C) 15

(D) 5

Correct Answer : D
Explanation :

Let men speed is =x km/hr

Speed of stream  in still water=y km/hr

x-y ==4


Q :  

The greatest number, which when divides 989 and 1327 leave remainder 5 and 7 respectively: 

(A) 8

(B) 16

(C) 24

(D) 32

Correct Answer : C

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