5 Minutes Test
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Test Report
Question No 1
The ages of two persons differ by 16 years. 6 years ago, the elder one was 3 times as old as the younger one. What are their present ages of the elder person?
Select the correct answer
Solution!
Let's take the present age of the elder person = x
and the present age of the younger person = x - 16
(x - 6) = 3 (x-16-6)
x - 6 = 3x - 66
2x = 60
x = 60/2 = 30.
Let's take the present age of the elder person = x
and the present age of the younger person = x - 16
(x - 6) = 3 (x-16-6)
x - 6 = 3x - 66
2x = 60
x = 60/2 = 30.
Question No 4
3 years ago, the average age of C and D was 18 years. With E joining them, the average becomes 22 years. How old is E now?
Select the correct answer
Solution!
Given that
[(C-3)+(D-3)]/2 = 18
C-3+D-3 = 36
C+D = 42 ...(1)
and also given that
(C+D+E)/3 = 22
C+D+E = 66
Put value of C+D from equation(1)
42+E = 66
E = 66-42
E = 24
Hence E is 24 years old now..
Given that
[(C-3)+(D-3)]/2 = 18
C-3+D-3 = 36
C+D = 42 ...(1)
and also given that
(C+D+E)/3 = 22
C+D+E = 66
Put value of C+D from equation(1)
42+E = 66
E = 66-42
E = 24
Hence E is 24 years old now..
Question No 5
A train travelling at he speed of 72km/h can cross a platform in 17 seconds. If length of the train is 180 meters, what is the length of the platform?
Select the correct answer
Solution!
Speed of train = v = 72Km/h = 72*(5/18) = 20m/s
Time = t = 17s
Length of the train = L1 = 180m
Length of the platform = L2 = ?
t = (L1+L2)/v
By putting values
17 = (180+L2)/20
340-180 = L2
L2 = 160m
Hence length of the platform is 160m..
Speed of train = v = 72Km/h = 72*(5/18) = 20m/s
Time = t = 17s
Length of the train = L1 = 180m
Length of the platform = L2 = ?
t = (L1+L2)/v
By putting values
17 = (180+L2)/20
340-180 = L2
L2 = 160m
Hence length of the platform is 160m..
Question No 7
Hussey introduced a girl to his friend and said, "Her mother is the only daughter of my Mother-in-law". What is the girl to Hussey?
Select the correct answer
Solution!
"Girl's mothers is only daughter of my mother-in-law" means Girls mother is the wife of Hussey. So Hussey is father of the girl..
"Girl's mothers is only daughter of my mother-in-law" means Girls mother is the wife of Hussey. So Hussey is father of the girl..
Question No 9
Pointing to a boy in the photograph Reena said, "He is the only son of the only child of my grandfather." How Reena is related to that boy?
Select the correct answer
Solution!
The boy in the photograph is the only son of Reena's grandfather's only son; i.e., the boy is the only son of Reena's father.
Hence, the boy is the brother of Reena or Reena is the sister of the boy..
The boy in the photograph is the only son of Reena's grandfather's only son; i.e., the boy is the only son of Reena's father.
Hence, the boy is the brother of Reena or Reena is the sister of the boy..