Question

find the sum of number between 1 to 500 which are divisible by 2 and 5​

Answer 1

Answer:

12250

Step-by-step explanation:

a=10, d= 10(5×2=10)

l=490

l=a+(n-1)d

490= 10+(n-1)10

480=10n-10

n=49

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

=49/2 [2×10+(48×10)

=49/2 × 500

=12250