Data Sufficiency Quiz- 1

Text solution:
From Statement I: Number of Students in class = 21 or 22 or 23 or 24 or 25 or 26

From Statement II:  Number of Students in class = 25 or 26 or 27 or 28 or 29 or 30.

Since the number of students can be divided into groups of 5 students, therefore the number of students must be multiple of 5.  The number of students in the class = 25 or 30  On combining Statements I and II  Number of students in the class = 25  Hence, the data in both the Statement I and II together are necessary to answer the question.



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Text solution:
From both I and II, we find that Rahul is (35 - 25) = 10 years older than his brother, who was born in 1964. So, Rahul was born in 1954.



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Text solution:
From I, we conclude that weight of each pole = (4x5) kg = 20 kg. So, total weight of 10 poles = (20 x 10) kg = 200 kg. From II, we conclude that: Weight of each pole = (weight of 3 poles) - (weight of 2 poles) = 20 kg. So, total weight of 10 pojes = (20 x 10) kg = 200 kg.

So we can conclude either I or II is sufficient



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Text solution:
From I, we conclude that H is the only daughter of M. But this does not indicate that M has no son. The information given in II is immaterial.



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Text solution:
From I, total sale of product A = Rs. (8000 x 25) = Rs. 200000. From II, we know that the company deals only in product A. This implies that sale of product A is the total sale of the company, which is Rs. 200000.



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Text solution:
From I, we conclude that 5th, 12th, 19th and 26th of March, 2006 were Sundays. So, the last Sunday fell on 26th.

From II, we conclude that 31st March, 2006 was Friday. Thus, 26th March, 2006 was the last Sunday of the month.



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Text solution:
The only word common to I and II is clear and as such, only the code for clear  can be ascertained from the given information.



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Text solution:
From II, Q being in the middle, there are 10 children to his right as well as to his left. So, Q is 11th from the left. From I, P is 15th from the left. Thus, from both I and II, we conclude that there are 3 children between P and Q.



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Text solution:
From I, we know that L is T s brother and J s husband. Since L is the only son of his parents, T is L s sister. From II, we know that K is L s daughter. Thus, from I and II, we conclude that T is the sister of K s father i.e. T is K s aunt.



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Text solution:
From II, we know that P s mother is married to J s husband, which means that J is P s mother.



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