Question

What is the sum of even numbers between 51 and 57

Answer 1

Answer:

52, 54 56

a= 52 ,d= 2 ,n= 3

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

Sn= 3/2(2×52 +(3-1)2)

Sn= 3/2 ( 104+ 4 )

Sn= 3/2( 108 )

Sn= 3×54

Sn = 162

sum of even number between 51 and 57 is 162