The presentation contains :Properties of square numbers.A square number always ends with 0,1,4,5,6 or 9 at its units place .A number ending in odd number of zeroes is never a perfect square.Numbers with their ones digit as 4 or 6 their squares also will have the 6 as ones digit.Numbers with their ones digit as 1 or 9 their squares also will have the 1 as ones digit.Numbers with their ones digit 5 their squares also will have the 5 as ones digit.Pattern for a perfect square ending in 25 with exam