Two pages that face each other in a book have 421 as the sum of their page numbers. what is the number of the page that comes first?

the pages will come on the first is  210

Explanation:

Since we have given that two pages that face each other in a book

i.e. they must be consecutive to each other

so, let the first page number be x

and the second page number be x+1

According to question,

2x=421 -1

2x=420

So, the pages will come on the first is  210

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58