Question

Q3. The squares of which of the following would be odd numbers?
(i) 431
(ii) 2826

Q4. Without adding, find the sum.
(i) 1 + 3 + 5 + 7 + 9
(ii) 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19

Answer 1

Q4.(i)1+3+5+7+9+=25

(ii)1+3+5+7+9+11+13+15+17+19=87

Answer 2

4 1st : 25 2nd : 100