Ex – 1.2 Que No. 2
Q.2) Prove that 3+2√5 is irrational. Solution:-
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Ex – 1.1 Que No. 7
Q.7) There is a circular path around a sports field. Sonia takes 18 minutes to drive one round of the field, while Ravi takes 12 minutes for the same. Suppose they both start at the same point and at the same time, and go in the same direction. After how many minutes will they meet
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Ex – 1.1 Que No. 6
Q.6) Explain why 7 × 11 × 13 + 13 and 7 × 6 × 5 × 4 × 3 × 2 × 1 + 5 are composite numbers. Solution:-
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Ex – 1.1 Que No. 5
Q.5) Check whether 6n can end with the digit 0 for any natural number n. Solution:-
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Ex – 1.1 Que No. 4
Q.4) Given that HCF (306, 657) = 9, find LCM (306, 657). Solution:-
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Ex – 1.1 Que No. 3
Q.3) Find the LCM and HCF of the following integers by applying the prime factorisation method. (i) 12, 15 and 21 (ii) 17, 23 and 29 (iii) 8, 9 and 25
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Ex – 1.1 Que No. 2
Q.2) Find the LCM and HCF of the following pairs of integers and verify that LCM × HCF = product of the two numbers. (i) 26 and 91 (ii) 510 and 92 (iii) 336 and 54
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Ex – 1.1 Que No. 1
Q.1) Express each number as a product of its prime factors: (i). 140 (ii). 156 (iii). 3825 (iv). 5005 (v). 7429
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The Proposal
Chapter – The Proposal We have translated your chapter from English to Hindi for your better understanding