How many unit squares will there be in pattern 80?
A6460
B6478
C6640
D6804
GOOD BUT A LITTLE BIT TOUGH . BUT IS COMMON TOO I THINK YOU SHOULD GIVE SOME RARE OR HARD WHICH THEY CAN DO .BUT TOO INTERESTING AND HELPFUL .
GOOD BUT A LITTLE BIT TOUGH . BUT IS COMMON TOO I THINK YOU SHOULD GIVE SOME RARE OR HARD WHICH THEY CAN DO .BUT TOO INTERESTING AND HELPFUL .