Question

Mark says, '81 is a square number. Therefore, 810 is a square number.'

Is Mark correct? Explain your answer.

Answer 1

mark is right

Explanation:

3+5x5 =13

Answer 2

Mark is not correct , becouse squared number Is number which can be after "=" when you times same numbers for example: 4*4=16 so 16 is squared number,is this make sense?