The square numbers of natural numbers are arranged in descending order: 14916236496481100.. what is the 351st digit?

The square number of only one digit is the square number of 1-3: the square number of only two digits of 1, 4 and 9 is the square number of 4-9, the square number of only three digits is the square number of 10-31, the square number of only four digits is the square number of 32-99, and the sum of the digits after the square number of 1-99 is 1 × 3 + 2 × 6 + 3 × 22 + 4 ×

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1. Arrange the square of natural number into 1492625364964 from small to large
2. If a and B are natural numbers, and the square of a - the square of B = 63, how to find the value of a and B, The square of x-a-2x-2a = (x + a) ()
3. If a natural number is divided by 247 to make 63, and by 248 to make 63, what is the remainder of a natural number divided by 26?
4. If a natural number is divided by 247, the remainder is 67, and is divided by 248, the remainder of the natural number divided by 26 can be found
5. If a natural number is divided by 427 into 63 and 248 into 63, what is the remainder of the natural number divided by 26
6. The product of four continuous natural numbers is 3024, and their sum is a26b52c30d28
7. 3024 is the product of four continuous natural numbers?
8. There are four students whose ages are just four consecutive natural numbers. The product of their ages is 5040. What are their ages?
9. There are four students whose ages are just four consecutive natural numbers. The product of their ages is 5040. What is the sum of their ages?
10. Is the multiplication of 2002 consecutive natural numbers odd or even? Is the multiplication of 2002 consecutive natural numbers odd or even? Why?
11. 7Y = y + 1 solve equations,
12. What is the square of the two differences of equation 3yy-2y-2 = 0?
13. A natural number can be decomposed into the product of three prime factors. If the sum of the squares of the three prime factors is 1710, how to find the natural number?
14. Write two continuous natural numbers that are combined numbers______ And______ ．
15. () and any non-zero natural number can form coprime numbers; the product of two prime numbers must be ()
16. There is a prime in two natural numbers. These two are coprime numbers, right?
17. What is the product of natural numbers less than 10 that are not prime numbers
18. When n = 1,2,3,4, the value of square + N + 41 of n is prime. Please write two values of N less than 45 so that square + N + 41 of n is not prime
19. If n is a natural number, N + 3 and N + 7 are prime numbers, find the remainder of N divided by 3
20. Is there at least one prime number in 20 consecutive natural numbers right Don't forget to say the reason