Selina solutions

Selina solutions

Selina solutions

Grade 6

Question 1

CHAPTERS

1. Number System (Consolidating the Sense of Numberness)

3. Numbers in India and International System (With Comparison)

5. Natural Numbers and Whole Numbers (Including Patterns)

6. Negative Numbers and Integers

12. Proportion (Including Word Problems)

17. Idea of Speed, Distance and Time

18. Fundamental Concepts (Algebra)

19. Fundamental Operations (Related to Algebraic Expressions)

20. Substitution (Including Use of Brackets as Grouping Symbols)

21. Framing Algebraic Expressions (Including Evaluation)

22. Simple (Linear) Equations (Including Word Problems)

23. Fundamental Concepts (Geometry)

25. Properties of Angles and Lines (Including Parallel Lines)

26. Triangles (Including Types, Properties and Construction)

30. Revision Exercise on Symmetry (Including Constructions on Symmetry)

32. Perimeter and Area of Plane Figures

Q1) State whether or not the following elements form a set; if not, give reason:

(i) All easy problems in your text book.

(ii) All three sided figures.

(iii) The first five counting numbers.

(iv) All the tall boys of your class.

(v) The last three days of the week.

(vi) All triangles that are difficult to draw.

(vii) The first three letters of the English alphabet.

(viii) All tasty fruits.

(ix) All clever boys of class 6.

(x) All good schools in Delhi.

(xi) All the girls in your class, whose heights are less than your height.

(xii) All the boys in your class, whose heights are more than your height.

(xiii) All the problems in your Mathematics book, which are difficult for Amit.

Solution 1:

(i) No; Some problems may be easy for one person but may be difficult to some other person

(ii) Yes

(iii) Yes

(iv) No ; it 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.

(v) Yes

(vi) 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

(vii) Yes

(viii) No; a fruit may be tasty for one person and may not be tasty to other person/persons

(ix) No ; clever in what respect and from whom out of six ?

(x) No ; All the people can not find the same schools as good as others said .

So, the objects are not well defined

(xi) Yes

(xii) Yes

(xiii) Yes

Still have questions? Our expert teachers can help you out

Book a free class nowNumber System (Consolidating the Sense of Numberness)

Numbers in India and International System (With Comparison)

Natural Numbers and Whole Numbers (Including Patterns)

Proportion (Including Word Problems)

Idea of Speed, Distance and Time

Fundamental Concepts (Algebra)

Fundamental Operations (Related to Algebraic Expressions)

Substitution (Including Use of Brackets as Grouping Symbols)

Framing Algebraic Expressions (Including Evaluation)

Simple (Linear) Equations (Including Word Problems)

Fundamental Concepts (Geometry)

Properties of Angles and Lines (Including Parallel Lines)

Triangles (Including Types, Properties and Construction)

Revision Exercise on Symmetry (Including Constructions on Symmetry)

Perimeter and Area of Plane Figures

Q1) State whether or not the following elements form a set; if not, give reason:

(i) All easy problems in your text book.

(ii) All three sided figures.

(iii) The first five counting numbers.

(iv) All the tall boys of your class.

(v) The last three days of the week.

(vi) All triangles that are difficult to draw.

(vii) The first three letters of the English alphabet.

(viii) All tasty fruits.

(ix) All clever boys of class 6.

(x) All good schools in Delhi.

(xi) All the girls in your class, whose heights are less than your height.

(xii) All the boys in your class, whose heights are more than your height.

(xiii) All the problems in your Mathematics book, which are difficult for Amit.

Solution 1:

(i) No; Some problems may be easy for one person but may be difficult to some other person

(ii) Yes

(iii) Yes

(iv) No ; it 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.

(v) Yes

(vi) 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

(vii) Yes

(viii) No; a fruit may be tasty for one person and may not be tasty to other person/persons

(ix) No ; clever in what respect and from whom out of six ?

(x) No ; All the people can not find the same schools as good as others said .

So, the objects are not well defined

(xi) Yes

(xii) Yes

(xiii) Yes

Still have questions? Our expert teachers can help you out

Book a free class nowLido

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