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Question 1 of 5
1. Question
A train takes 10 s to cross a pole and 20 s to cross a platform of length 200 m. What is the length of the train?
Correct
Ans: d
Let length of the train be lm
∴Speed of train= (l/10)m/s
Distance covered by train to cross the platform of length
200 m= (l+ 200) m
Time taken to cross the platform = Distance/Speed
20 = (l+200)/(1/10)
(l/10)´20 = l+200
2l-1= 200
∴l = 200 m
Hence, length of the train is 200 m.
Incorrect
Ans: d
Let length of the train be lm
∴Speed of train= (l/10)m/s
Distance covered by train to cross the platform of length
200 m= (l+ 200) m
Time taken to cross the platform = Distance/Speed
20 = (l+200)/(1/10)
(l/10)´20 = l+200
2l-1= 200
∴l = 200 m
Hence, length of the train is 200 m.
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Question 2 of 5
2. Question
A class has a strength of 48 students; out of which 18 are boys. The students are to be seated in rows such that the number of students in all of the rows is equal. If none of the rows has both boys and girls, then what is the maximum number of students sitting in one row?
Correct
Ans: b
Number of boys in the class 18
Number of girls in the class
= 48-18-30
: HCF of 18 and 30 = 6
So , a row can have maximum number of 6 students
Incorrect
Ans: b
Number of boys in the class 18
Number of girls in the class
= 48-18-30
: HCF of 18 and 30 = 6
So , a row can have maximum number of 6 students
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Question 3 of 5
3. Question
What is the value of ( √0.0032)/ (√0.32 ) ?
Correct
Ans: d
√0.0032/√0.32=(√0.32/√100)* 1√0.32= 1/10= 0.1
Incorrect
Ans: d
√0.0032/√0.32=(√0.32/√100)* 1√0.32= 1/10= 0.1
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Question 4 of 5
4. Question
Which one of the following is neither prime number nor composite number?
Correct
Ans: a
We know that, a counting number is called a prime number when it has exactly two factors, 1 and itself. A prime number is always greater than 1.
Composite number are non-prime natural numbers. The must have atleast one factor apart from 1 and itself. 1 is not a composite number.
Hence, 1 is neither prime number nor composite number.
Incorrect
Ans: a
We know that, a counting number is called a prime number when it has exactly two factors, 1 and itself. A prime number is always greater than 1.
Composite number are non-prime natural numbers. The must have atleast one factor apart from 1 and itself. 1 is not a composite number.
Hence, 1 is neither prime number nor composite number.
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Question 5 of 5
5. Question
The seven digit number 876p37q is divisible by 225. The values of p and q can be respectively
Correct
Ans: d
Seven digits number 876p37q is divisible by 225, then this number is also divisible by 9 and 25.
If this number is divisible by 9.
\Sum of its digits is divisible by 9
Now, sum of digits= 8+ 7 + 6+ P+ 3+ 7+ q = 31+ p+q
p+q= 5 or p + q=14,q must be 5, if q= 5, p = 0 and 9
Incorrect
Ans: d
Seven digits number 876p37q is divisible by 225, then this number is also divisible by 9 and 25.
If this number is divisible by 9.
\Sum of its digits is divisible by 9
Now, sum of digits= 8+ 7 + 6+ P+ 3+ 7+ q = 31+ p+q
p+q= 5 or p + q=14,q must be 5, if q= 5, p = 0 and 9
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