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Ex 1.2: Q.2(iii) : Find the LCM and HCF of the following pairs... Ch 1 | Class Xth Math for CBSE

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Published on Mar 12, 2012

In this video, LCM and HCF of the given pair of integers is calculated and the result LCM × HCF = product of the two numbers, is verified.

Ask a question or discussions on : http://gurubix.com/video-26-Ex_1_2_Q_...

All videos from Chapter 1
Theorems-

Th.1.1- Euclid's Division Lemma...
(http://www.youtube.com/watch?v=7pmOv2...)

Th. 1.2- Fundamental Theorem of Arithmetic...
(http://www.youtube.com/watch?v=7Y8w82...)

Th. 1.3- If the square of a number is divisible by a prime, the number is also divisible by it...
(http://www.youtube.com/watch?v=XxwEcc...)

Th. 1.4- Square root of 2 is Irrational...
(http://www.youtube.com/watch?v=Gb30Fo...)

Theory-

1- What is Co-prime Numbers..
(http://www.youtube.com/watch?v=ef2YZn...)

2- What is the Number Line..
(http://www.youtube.com/watch?v=r0GY_b...)

3- Understanding the Real Numbers..
(http://www.youtube.com/watch?v=q-fHYg...)

4- Understanding the irrational numbers..
(http://www.youtube.com/watch?v=0K0-CJ...)

Examples -

Ex. 9 - Prove that square root...
(http://www.youtube.com/watch?v=TiKjGX...)

Ex. 10- Prove that 5 minus....
(http://www.youtube.com/watch?v=Eabux_...)

Ex. 11- Prove that the product...
(http://www.youtube.com/watch?v=JG4_-W...)

Exercise 1.1

Q. 1(i) : Use Euclid's division algoithm...
(http://www.youtube.com/watch?v=9CqtrM...)

Q. 1(ii) : Use Euclid's division algoithm to find...
(http://www.youtube.com/watch?v=bElVUX...)

Q. 1(iii) : Use Euclid's division algoithm to find HCF...
(http://www.youtube.com/watch?v=iAoFwa...)

Q.. 2 : Show that any positive odd integer is of the form 6q + 1...
(http://www.youtube.com/watch?v=QdDMM8...)

Q. 3 : An army contingent of 616 members ...
(http://www.youtube.com/watch?v=xbPNjq...)

Q. 4 : Use Euclid's division lemma ...
(http://www.youtube.com/watch?v=LBsXr8...)

Q. 5 : Use Euclid's division lemma to ...
(http://www.youtube.com/watch?v=-0ecOg...)

Exercise 1.2

Q. 1 : Express each number as ...
(http://www.youtube.com/watch?v=WiQUuN...)

Q. 2(i) : Find the LCM and HCF of the following pairs...
(http://www.youtube.com/watch?v=OLmMIj...)

Q. 2(ii) : Find the LCM and HCF of the following pairs..
(http://www.youtube.com/watch?v=WxXLJn...)

Q.2(iii) : Find the LCM and HCF of the ...
(http://www.youtube.com/watch?v=dTJEF0...)

Q. 3(i) : Find the LCM and HCF of the following integers ...
(http://www.youtube.com/watch?v=hdkvxj...)

Q. 3(ii) : Find the LCM and HCF of the following integers ...
(http://www.youtube.com/watch?v=Ouq447...)

Q.3(iii) : Find the LCM and HCF of the following integers ...
(http://www.youtube.com/watch?v=ucJ2Ps...)

Q. 4 : Given that HCF (306, 657) = 9....
(http://www.youtube.com/watch?v=hf5QDI...)

Q. 5 : Check whether 6 raise to ...
(http://www.youtube.com/watch?v=fJUvGk...)

Q. 6 : Explain why 7 × 11 × 13 + 13 and ...
(http://www.youtube.com/watch?v=ToNuEa...)

Q. 7 : There is a circular path around ...
(http://www.youtube.com/watch?v=0V2Hq8...)

Exercise 1.3

Q. 1:Prove that square root of 5 is irrational...
(http://www.youtube.com/watch?v=YoI-f3...)

Q. 2 : Prove that sum of 3 and product of 2 and...
(http://www.youtube.com/watch?v=FP7ey0...)

Q. 3(i) : Prove that quotient of 1 and...
(http://www.youtube.com/watch?v=ZK48cY...)

Q. 3(ii) : Prove that product of 7 and...
(http://www.youtube.com/watch?v=jwz_eg...)

Q. 3(iii) : Prove that sum of 6 and...
(http://www.youtube.com/watch?v=T_MWVw...)

Exercise 1.4

Q. 2(i) : Write down the decimal expansions ...
(http://www.youtube.com/watch?v=No6GEI...)

Q. 2(ii) : Write down the decimal expansions of ...
(http://www.youtube.com/watch?v=NUehoN...)

Q. 2(iii) : Write down the decimal expansions of ...
(http://www.youtube.com/watch?v=LkqQWE...)

Q. 2(iv) : Write down the decimal expansions of ...
(http://www.youtube.com/watch?v=a9AsiH...)

Q. 2(v) : Write down the decimal expansions of ...
(http://www.youtube.com/watch?v=4QBJB6...)

Q. 2(vi) : Write down the decimal expansions of ...
(http://www.youtube.com/watch?v=9AVT37...)

Q. 2(vii) : Write down the decimal expansions of ...
(http://www.youtube.com/watch?v=1zXvUE...)

Q. 2(viii) : Write down the decimal expansions ...
(http://www.youtube.com/watch?v=N_caqR...)

Q. 2(ix) : Write down the decimal expansions ...
(http://www.youtube.com/watch?v=-4hptQ...)

Q. 2(x) : Write down the decimal ..
(http://www.youtube.com/watch?v=XlO6ZF...)

Q. 3 : The following real numbers ...
(http://www.youtube.com/watch?v=qkJ3w1...)

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