Question

Find the sum of all odd numbers between 0 and 60

Answer 1

${\huge{\star}{\color{blue}{\rm{Answer}}}} \huge\star$

AP of odd no. from 0 and 60 are:-

1,3,5,7........59

A=1

D=3-1=2

N=30

L=59

$Sn = \frac{n}{2} (a + l) \\ \\ = \frac{30}{2} (1 + 59) \\ \\ = 15 \times 60 \\ \\ = 900$

Answer 2

Answer:

${\huge{\star}{\color{blue}{\rm{Answer}}}} \huge\star$

AP of odd no. from 0 and 60 are:-

1,3,5,7........59

A=1

D=3-1=2

N=30

L=59

$\begin{gathered}Sn = \frac{n}{2} (a + l) \\ \\ = \frac{30}{2} (1 + 59) \\ \\ = 15 \times 60 \\ \\ = 900\end{gathered}$