Practice the questions provided in the worksheet on elements form a set. The questions are based on whether the given objects form a set or the objects do not form a set.

**State, whether the following elements form a set or not; if not given reason:**

**1.** All easy problems in your text book.

**2.** Capitals of all countries in Asia

**3.** All three sided figures.

**4.** First five counting numbers.

**5.** All the tall boys of your class.

**6.** Last three days of the week.

**7.** Five red flowers

**8.** All triangles that is difficult to draw.

**9.** First three letters of the English alphabet.

**10.** Numbers divisible by 5

**11.** All tasty fruits.

**12.** All clever boys of class VI

**13.** Tall buildings in Mumbai

**14.** All good schools in Florida.

**15.** No, it is not mentioned which four planets are included
and which are excluded.

**16.** All the girls in your class, whose heights are less than
the height of Maria.

**17.** All the boys in your class, whose heights are more than
the height of Maria.

**18.** All the problems in your Mathematics book, which are
difficult to Ron.

**19.** All the planets in the solar system

Answers for the worksheet on elements form a set are given below to check the exact answers of the above questions on whether the objects are well-defined or not.

**Answers:**

**1.** No, some problems may be easy for one person but may not
be easy to some other person. Objects are not well-defined.

**2.** Yes

**3.** Yes

**4.** Yes

**5.** No, it is not mention that the boys must be taller than
which boy. If we consider three boys A, B and C: boy A can be taller than B but
not necessarily taller than C.

**6.** Yes

**7.** No, it is not mentioned which flowers is to be included
and which is to be excluded so, the objects are not well-defined.

**8.** No, it may be difficult for one boy to draw a given
triangle but to some other boy it may not be difficult to draw the same
triangle.

**9.** Yes

**10.** Yes

**11.** No, a fruit may be tasty for one person and may not be
tasty to the other person.

**12.** No, clever in what respect?

**13.** No, it is not mention that the buildings must be taller
than which building.

**14.** No, all the people cannot find the same schools as good
schools so, the objects are not well-defined.

**15.** No, it is not mentioned which four planets are included
and which are excluded.

**16.** Yes

**17.** Yes

**18.** Yes

**19.** Yes

● **Sets and Venn-diagrams Worksheets**

**● **Worksheet on
Elements Form a Set

**● **Worksheet to
Find the Elements of Sets

**● **Worksheet on
Properties of a Set

**● **Worksheet on
Sets in Roster Form

**● **Worksheet on
Sets in Set-builder Form

**● **Worksheet on
Finite and Infinite Sets

**● **Worksheet on
Equal Sets and Equivalent Sets

**● **Worksheet on
Union and Intersection of Sets

**● **Worksheet on
Disjoint Sets and Overlapping Sets

**● **Worksheet on Difference of Two Sets

**● **Worksheet on Operation on Sets

**● **Worksheet on Cardinal Number of a Set

**Math Home Work Sheets**

**From Worksheet on Elements Form a Set to HOME PAGE**

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