Question

Find the sum of all even numbers between 10 to hundred

Answer 1

Step-by-step explanation:

a=12

d=2

an=98

an= a+(n-1)d

98= 12+(n-1)2

98-12=(n-1)2

n-1=86/2

n-1= 43

n=43+1=44

sn= (44/2)*(12+98)

= 22*(110)

=2420