Q4 of 43 Page 3

Write the following sets using listing method.

i. All months in the Indian solar year.


ii. Letters in the word ‘COMPLEMENT’.


iii. Set of human sensory organs.


iv. Set of prime numbers from 1 to 20.


v. Names of continents of the world.

i. We know that in listing method, we write all the elements of a set in curly bracket. Each of the elements is written only once and separated by commas. The order of an element is not important but it is necessary to write all the elements of the set.


A = {Mesa, Vrsabha, Mithuna, Karkata, Simha, Kanya, Tula, Vrscika, Dhanu, Makara, Kumbha, Mina}


ii. B = {C, O, M, P, L, E, N, T}


iii. C = {Eyes, Ears, Nose, Mouth, Skin}


iv. D = {2, 3, 5, 7, 11, 13, 17, 19}


v. E = {Asia, Africa, North America, South America, Antarctica, Europe, Australia}


More from this chapter

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2

Write the following symbolic statements in words.

i. 4/3 ∈ Q


ii. - 2 N


iii. P = {P is an odd number}

 3

Write any two sets by listing method and by rule method.

 5

Write the following sets using rule method. We know that in rule method, we do not write the list of elements but write the general element using variable followed by a vertical line or colon and write the property of the variable.

i. A = {1,4,9,16,25,36,49,64,81,100}


ii. B = {6,12,18,24,30,36,42,48}


iii. C = {S, M, I, L, E}


iv. D = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}

 1

Decide which of the following are equal sets and which are not? Justify your answer.

A = {x|3x – 1 = 2}


B = {x | x is a natural number but x is neither prime nor composite}


C = {x |x ∈ N, x < 2}