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Subject : Aptitude

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Question 1: A Function consists of grandmother, father,mother, four sons and their wives and one son and two daughters to each of the sons. how many females are there is all?

(a) 15  (b) 16 (c) 18 (d) 14       Answer 14

Solution : Grandmother is one Female, Mother is another, wives of four sons are the four females and two daughters of all four sons are eight females.
1+1+4+8=14 Females

Question 2: Sum of all odd numbers up to100 is ..

(a) 5050 (b) 2500 (c) 2525 (d) 5000 

Solution: Given numbers are 1,3,5....99.
This is an A.P with a=1, d=2.
Let it contain n terms 

1+(n-1)2=99 --> n=55
hence required sum=n/2(first term +last term)
                               =50/2(1+99)=2500.

Question 3: GATE | GATE CS 2013 | GATE Exam

What will be the maximum sum of 44, 42, 40, …… ?

(A) 502  (B) 504 (C) 506 (D) 500

Explain: Click 

Question 3:  If 137 + 276 = 435 how much is 731 + 672 ?  solve 1 Minute

( A) 534  (B) 1403 (C) 1623 (D) 1513
Explain: Click  

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Subject : Aptitude - Time and Distance

1. 400m long train is running at 72 Kmph. how much time it will take to cross an electric pole?

A.) 15sec     B.) 20sec
C.) 19sec     D.) 21sec

Solution: 
Distance = Speed * Time
If we convert Kmph in to Mpsec multiply by 5/18,
400 = 72 KmpH * time
400 = 72*5/18 * time
Time = 20Sec
2.A 180m long train is running at 54 Kmph. how much time it will take to cross a platform of 120m long?

A.) 20sec     B.) 22sec
C.) 19sec       D.) 18sec
 
Solution: 
D = S * T
180 = 54 Kmph * Time
180= 54*5/18 * Time
Time = 20 Sec

3.320m long train is running at 72 Kmph. how much time it will take to cross a platform of 180m long?

A.) 20sec     B.) 25sec
C.) 30sec     D.) 27sec
Solution : 
Total Length = platform Length+ Train Length
Total Length= 500m
D = S * T

4.A 600m long train is running at 90 Kmph. how much time it will take to cross an electric pole?

A.) 16sec     B.) 20sec
C.) 24sec     D.) 22sec

Solution
 D = S * T
600 = 90 Kmph * T
> 600 = 90 * 5/18 * T
Time = 24Sec

5.Two trains 300m and 400m long run at the speeds of 40 kmph and 50kmph respectively in opposite Directions on parallel tracks. The time taken to cross each other?

A.) 20sec     B.) 25secs
C.) 26sec     D.) 28sec


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