Question

method.
(i) 12,15 and 21 (ii) 17,23 and 29
(iii) 8, 9 and 25
4. Given that HCF (306, 657)=9, find LCM (306, 657).
5. Check whether 6" can end with the digit 0 for any natural number n.
6. Explain why 7 x 11 13+13 and 7 x6x5x4x3 x 2x1 +5 are composite number:
7. There is a circular path around a sports field. Sonia takes 18 minutes to drive one ro
of the field, while Ravi takes 12 minutes for the same. Suppose they both start at
same point and at the same time, and go in the same direction. After how many min
will they meet again at the starting point?
1.4 Revisiting Irrational Numbers
In Class IX, you were introduced to irrational numbers and many of their proper
You studied about their existence and how the rationals and the irrationals toge
made up the real numbers. You even studied how to locate irrationals on the nur
line. However, we did not prove that they were irrationals. In this section, we
tha 2. 13. 15 and, in general, Vp is irrational, wherep is a prime. O​

Answer 1

your 4,5, 6,7, questions answer..

I hope u got your answer.

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