A) r^2 - r
B) r^2 + 1
C) r^2
D) r^2 - 1
E) r^2 + r
OA:
A
A
Ignore the constraint that r>10.sukriti2hats wrote:A rectangular game board is composed of identical squares arranged in a rectangular array of r rows and r+1 columns. The r rows are numbered from 1 through r and the r+1 columns are numbered from 1 through r+1. If r>10 then which of the following represents number of squares that are neither in the 4th row nor in the 7th column?
A) r^2 - r
B) r^2 + 1
C) r^2
D) r^2 - 1
E) r^2 + r
Solution:sukriti2hats wrote: ↑Fri Aug 29, 2014 10:27 pmA rectangular game board is composed of identical squares arranged in a rectangular array of r rows and r+1 columns. The r rows are numbered from 1 through r and the r+1 columns are numbered from 1 through r+1. If r>10 then which of the following represents number of squares that are neither in the 4th row nor in the 7th column?
A) r^2 - r
B) r^2 + 1
C) r^2
D) r^2 - 1
E) r^2 + r
OA:A