Maharashtra Board Class 9 Math Part-1 Chapter 1 Sets: Practice Set 1.1 Solutions

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Get step-by-step solutions for Practice Set 1.1 of the Class 9 Maths ‘Sets’ chapter (Maharashtra Board). This quick reference guide covers all your algebra questions, from roster form to rule method. Designed specifically for 9th-standard students, this post will help you understand core concepts and prepare for your exams efficiently.

📝 Q(1) Write the following sets in roster form.

(i) Set of even natural numbers

💡 Answer A = {2, 4, 6, 8, ...}

(ii) Set of even prime numbers from 1 to 50

💡 Answer B = {2}

(iii) Set of negative integers

💡 Answer C = {..., -3, -2, -1}

(iv) Seven basic sounds of a sargam (sur)

💡 Answer D = {Sa, Re, Ga, Ma, Pa, Dha, Ni}

📝 Q(2) Write the following symbolic statements in words.

(i) 4/3 ∈ Q

💡 Answer 4/3 is an element of set Q.

(ii) -2 ∉ N

💡 Answer -2 is not an element of set N.

(iii) P = {p | p is an odd number}

💡 Answer Set P is the set of all 'p' such that 'p' is an odd number.

📝 Q(3) Write any two sets by listing method and by rule method.

Example 1:

Listing A = {2, 4, 6, 8, 10}

Rule A = {x | x is an even natural number less than 12}

Example 2:

Listing B = {a, e, i, o, u}

Rule B = {x | x is a vowel in the English alphabet}

📝 Q(4) Write the following sets using listing method.

(i) All months in the indian solar year.

💡 Answer A = {Chaitra, Vaishakha, Jyeshtha, Ashadha, Shravana, Bhadrapada, Ashwin, Kartika, Margashirsha, Pausha, Magha, Phalguna}

(ii) Letters in the word ‘COMPLEMENT’.

💡 Answer B = {C, O, M, P, L, E, N, T}

(iii) Set of human sensory organs.

💡 Answer C = {Nose, Ears, Eyes, Tongue, Skin}

(iv) Set of prime numbers from 1 to 20.

💡 Answer D = {2, 3, 5, 7, 11, 13, 17, 19}

(v) Names of continents of the world.

💡 Answer E = {Asia, Africa, North America, South America, Antarctica, Europe, Australia}

📝 Q(5) Write the following sets using rule method.

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

💡 Answer A = {x | x = n², n ∈ N, n ≤ 10}

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

💡 Answer B = {x | x = 6n, n ∈ N, n ≤ 8}

(iii) C = {S, M, I, L, E}

💡 Answer C = {x | x is a letter in the word 'SMILE'}

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

💡 Answer D = {x | x is a day of the week}

(v) X = {a, e, t}

💡 Answer X = {x | x is a letter in the word 'eat'}

🚀 What's Next After Practice Set 1.1?

Congratulations on completing Practice Set 1.1! We hope these step-by-step solutions made the concepts of roster form, rule method, and sets easier to understand. Consistent practice is the secret to scoring high marks in your Maharashtra Board Class 9 Maths exams.

Now that you have confidently solved Practice Set 1.1, it’s time to level up your algebra skills. Click on the links below to continue learning with the next exercises of Chapter 1:

More Solutions for Chapter 1 (Sets):

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