Among integers with absolute value less than 401, there are () complete squares

It's 21. The square of positive and negative (1-20), a total of 20, and one 0

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1. Among all integers whose absolute value is less than 100, the suspicious numbers written as the square of integers are () a.18 B: 19 C: 10 d: 9 The 101st power of 0.125 × the 102nd power of 8 =?
2. What is the sum of all integers whose absolute value is less than 1000?
3. Among the integers whose absolute value is less than 100, there are () integers that can be written as squares and () integers that can be written as cubes fast Why
4. What is the product of all integers whose absolute value is less than 1000
5. (1) Find all complete squares within 1-1000 1 find all complete squares within 1-1000 2 input a number of numbers from the keyboard, end with 0, count the number of positive and negative numbers
6. What is the square of 1000
7. The sum of two positive integers is 1000 less than the product, and one of them is a complete square number
8. Find the sum of all complete squares in [10009999]
9. 2520 times the natural number a to get a square. What is the minimum of a?
10. If there is a natural number whose sum with 160 is equal to the square of a certain number, and whose sum with 84 is equal to the square of another number, then the natural number is______ ．
11. A natural number, after adding 79, becomes a complete square number, after adding 204, is still a complete square number. Find this natural number
12. If there is a number greater than 1 and the remainder is the same except 45 ', 59' and 101 ', what is the number?
13. 33.67.118 divide the same number by which number, and the remainder is the same?. 2 - there is a natural number greater than 1, and the remainder is the same except 45.59.101. What is this number?
14. If there is an integer greater than 1, the remainder obtained by dividing 45, 59101 is the same
15. For a natural number greater than 1, the remainder obtained by dividing 45, 59101 is the same
16. If there is an integer greater than 1, the remainder obtained by dividing 45, 59101 is the same
17. Find 1! + 2! + 3 +! + +Is the sum of 10! A perfect square? The following formula is 1! + 2! + 3! + +Is the result of 10! A complete square?
18. A is an integer to prove that 3A ^ 2 + 12a + 7 is not a complete square number
19. Given that n △ 2 is a perfect square number and N △ 3 is a cubic number, what is the minimum value of N?
20. For a two digit number, the number on the one digit is 4 less than the number on the ten digit number, and the sum of squares of the number on the one digit and the number on the ten digit is 4 less than the two digit number