Question

= 22338
EXERCISE 1.2
Express each number as a product of its prime factors:
(i) 140
(ii) 156
(iii) 3825
(iv) 5005
(v) 7429
(vi) 689724
Find the LCM and HCF of the following pairs of integers and verify that LCM X
HCF = product of the two numbers.
(i) 26 and 91
(ii) 510 and 92
(ii) 336 and 54
(iv) 2520 and 3300
Find the LCM and HSF of the followi​

Answer 1

Answer:

Cost price of a carpet is 12500. It is sold at 15% loss. Find its selling price.

Answer 2

:

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(i) 140

140=2×70

=2×2×35

=2×2×5×7

=2×2×5×7×1

(ii) 156

156=2×78

=2×2×39

=2×2×3×13

=2×2×3×13×1

(iii) 3825

3825=3×1275

=3×3×425

=3×3×5×85

=3×3×5×5×17

=3×3×5×5×17×1

(iv) 5005

5005=5×1001

=5×7×143

=5×7×11×13

=5×7×11×13×1

(v) 7429

7429=17×437

=17×19×23

=17×19×23×1(i) 140

140=2×70

=2×2×35

=2×2×5×7

=2×2×5×7×1

(ii) 156

156=2×78

=2×2×39

=2×2×3×13

=2×2×3×13×1

(iii) 3825

3825=3×1275

=3×3×425

=3×3×5×85

=3×3×5×5×17

=3×3×5×5×17×1

(iv) 5005

5005=5×1001

=5×7×143

=5×7×11×13

=5×7×11×13×1

(v) 7429

7429=17×437

=17×19×23

=17×19×23×1