Question

If all the odd numbers will be added between 1 to 99 what number we will get​

Answer 1

Answer:

2450

Step-by-step explanation:

let it be 1 ,3,5.......99

n(n+1)

49(49+1)

49×50

2450

please verfiy once is it corre

Answer 2

Answer:

Step-by-step explanation:

this can be solved using arithmetic progression

the AP= 1,3,5.....99

d=2

a=1

an=99

we know, an=a+(n-1)d

 99=1+(n-1)2

 99= 1+2n-2

 99+1=2n

 100=2n

 n=50

also sum of n terms:

Sn=n/2(2a+(n-1)d)

Sn=50/2(2+ 49x2)

Sn=50/2(2+ 98)

Sn=(50 x 100)/2

Sn=50 x 50

Sn=2500

sum of all odd no. between 1 and 99 is 2500