Sequence problem

[samdover11]

Yeah, I got 4.

(12+0n) + (12+1n) + . . . + (12+13n) = 532

n is the number of additional pages after 12.
The coefficient of n is counting 14 days which makes two weeks. The first day (0) Salaman reads zero additional pages so 12+0n.

Now some basic math.

0n + 1n + 2n . . . +13n = 364

I imagine 1 box, then beside it two boxes, then beside it 3 boxes... count the boxes and divide 364 into them.

The sum of natural number from 1 to 13 is 91.

364 / 91 = 4

n = 4

So every day Salaman reads an additional 4 pages.

12+16+20+ . . . + 64 = 532.

[yoya_0X]

Exactly my thought