999
300
Multiply the three-digit number by the one's digit, or last digit, of the two-digit number. That is your first part. Now multiply by the second-to-last digit, or ten's digit, and multiply the result by 10. That is your second part. Add the two parts and that is your answer.
997 is the last 3 digit prime number
2010
2011
208
102 = 100 which is the first possible three digit number that is a perfect square. 312 = 961 which is the last possible three digit number that is a perfect square. So there are 22 three digit positive numbers that are perfect squares.
The last digit of the number 42012 is 2.
Look at the last digit. If a number's last digit is even, the number is even. If the last digit is odd, the number is odd.
Look at the last digit. If the last digit is even, the entire number is even. If the last digit is odd, the entire number is odd.
find the diagonal method of two digit number and three digit number
Look at the last digit. If the last digit is even, the number is even. If the last digit is odd, the number is odd.