Question

6.
Without adding, find the sum of the following:
(i) 1+3+5+7+9+11+13
(ii) 1+3+5+7+9+11+13+15+17
(iii) 1+3+5+7+9+11+13+15+17 + 19 +21
(iv) 1+3+5+7+9+11+13+15+17+19+21+23
25 +27
7.
Express the following as the sum of odd numbers:
(i) 36 (ii) 64 (iii) 120 (iv) 168
Find the Pythagorean triplet, if its first member is:
(i) 6 (ii) 12 (iii) 18 (iv) 30
8.
Using prime factorization method​

Answer 1

Step-by-step explanation:

don't post all questions together.....it's tooo hectic.......plz post it as separate separate questions..

Answer 2

6.) WITHOUT ADDING FIND THE SUM OF THE FOLLOWING...

(1) 49

(2)81

(3)99

(4)196

7.) EXPRESS THE FOLLOWING AS THE SUM OF ODD NUMBERS..

(1) 1+3+5+7+9+11

(2)1+3+5+7+9+11+13+15

(3)1+3+5+7+9+11+13+15+17+19+21

(4)1+3+5+7+9+11+13+15+17+19+21+23+25