Questions · Page 2 of 2

[1 Mark Question Answer]

Question 511 Mark
Write the set containing:
The names of any three Prime-Ministers of India.
Answer
{J.L. Nehru, A.B. Vajpayee, Dr. Manmohan Singh}.
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Question 551 Mark
Write the set containing:
The three types of triangles
Answer
{scalene triangle, isosceles triangles, equilateral triangle}.
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Question 581 Mark
State whether or not the following elements form a set; if not, give reason:
All the problems in your Mathematics book, which are difficult for Amit
Answer
Yes
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Question 591 Mark
State whether or not the following elements form a set; if not, give reason:
All the boys in your class, whose heights are more than your height
Answer
Yes
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Question 601 Mark
State whether or not the following elements form a set; if not, give reason:
All the girls in your class, whose heights are less than your height
Answer
Yes
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Question 611 Mark
State whether or not the following elements form a set; if not, give reason:
All good schools in Delhi
Answer
No
All the people can not find the same schools as good as others said. So, the objects are not well-defined.
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Question 621 Mark
State whether or not the following elements form a set; if not, give reason:
All clever boys of class 6
Answer
No
Clever in what respect and from whom out of six?
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Question 631 Mark
State whether or not the following elements form a set; if not, give reason:
All tasty fruits
Answer
No
A fruit may be tasty for one person and may not be tasty to other person /persons
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Question 641 Mark
State whether or not the following elements form a set; if not, give reason:
The first three letters of the English alphabet
Answer
Yes
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Question 651 Mark
State whether or not the following elements form a set; if not, give reason:
All triangles that are difficult to draw
Answer
No
It may be difficult for one boy to draw a given triangle but to some other boy it may be easy to draw the same triangle.
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Question 661 Mark
State whether or not the following elements form a set; if not, give reason:
The last three days of the week
Answer
Yes
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Question 671 Mark
State whether or not the following elements form a set; if not, give reason:
All the tall boys of your class
Answer
No
Tt is not mentioned that the boys must be taller than which boy. If we consider three boys A, B and C; boy B can be taller than A but not necessarily taller than C.
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Question 681 Mark
State whether or not the following elements form a set; if not, give reason:
The first five counting numbers
Answer
Yes
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Question 691 Mark
State whether or not the following elements form a set; if not, give reason:
All three sided figures
Answer
Yes
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Question 701 Mark
State whether or not the following elements form a set; if not, give reason:
All easy problems in your text book
Answer
No
Some problems may be easy for one person but may be difficult to some other person. Objects are not well- defined.
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[1 Mark Question Answer] - Page 2 - MATHS STD 6 Questions - Vidyadip