Question

Sum of the 4+8+12+.............................+52 is?

Answer 1

Answer:

in this pair the table of 4 is there 4 +8+12+16+20+24+28+32+36+40+44+48+52 = 364

Answer 2

here

A=4 ,d=4(8-4),An=52 , n=?

An=a+(n-1)d

52=4+(n-1)4

48/4=n-1

12-1=n

11

now,

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

Sn=11/2(48)

Sn=24×11

Sn=264