An Indian mathematician named Caprija was caught in a violent storm during a trip. After the thunder and lightning, he saw a milestone on the side of the road, which was split in half by lightning, half engraved with 30 and the other half engraved with 25. At this time, Capri's mind suddenly found a wonderful mathematical relationship-30+25 = 55 55 2 = 3025. Add up the numbers that are divided into two halves, and then square them, which is exactly the original number. In addition, are there any other figures with this nature? Those familiar with fast calculation will soon find another number: 202520+25 = 45 45 2 = 2025. According to the name of the first discoverer, this strange number was named "Capri addendum", also known as "thunder crack number". There are many ways to search for this number, but the simplest way is to find it in multiples of 9 and 1 1. For example, 55 mentioned above is a multiple of 1 1, and 45 is a multiple of 9. In this way, people really found an extremely interesting 777, which is not difficult to look up: 7772 = 60481729 6048+1729 = 7777. Katja, a child of the former Soviet Union, also found a new "lightning crack number", which is 980 1. 98+1= 99,99 2 = 9801From the four "lightning strikes" mentioned above, we can easily find the same situation: even+odd = odd, and the square of odd = odd. 3025,2025,9801,6048 1729 are all odd numbers. So, is there an even number of lightning strikes? The answer is yes. Seven years ago, a student in the primary school affiliated to Luzhou Normal University found the even number of "lightning strike": 100, because 10 = 10,10 2 = 100,100. This classmate also found the smallest odd number of lightning: 8 1, because 8+1= 9,9 2 = 81.