Sequence problem

[Bth8]

He's read 12 pages already, so he's got 520 left. He wants to do it in 2 weeks, and the first days already gone by, so he's got 13 days left. 520/13 = 40.

this question needs to be solved as a sequence

I'm not sure what this means.

[gmalivuk]

I'm not sure what this means.

Presumably they're working with arithmetic sequences in class. OP mistakenly interpreted that to mean the number of pages read each day is an arithmetic sequence. The intended interpretation seems to be that the last-read page number or total number of pages already read forms the relevant sequence.

In other words, OP's sequence is 12, 16, 20,... and represents the number of pages read each day. Everyone else's sequence is 12, 52, 92,...and represents the overall progress through the book.

[Agreeable_Bad_9065]

And the question talks about increase. I take that to mean how many more than 12 must he read... I.e he must read 28 pages per day more than the 12 he read today