In 2020, If we multiply first two digits and last two digits then result will be a perfect square(i.e., 20 × 20 = 400 = 202). How many such numbers exist between 2010 to 2099?
(Exclude 2020)
If we multiply all the digits of 78549542, what will be the last two digits of the resultant number?
If we add two digits the result is a 2 digit number. If we multiply these digits the result is a 1 digit number. Identify the digits.