The number whose square equals 64 is

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• 1. Fill in the blanks of summation sequence: 1,1,1,2,3,5,9, () Fill in the blanks of summation sequence: 1,1,1,2,3,5,9, () What number should be filled in () please? Please write a solution process, thank you
• 2. Write the nine numbers 10, 11, 12, 13, 14, 15, 16, 17 and 18 in the 3 * 3 grid, so that the horizontal, vertical and oblique lines are all equal to 42
• 3. What is one minus one
• 4. In the first 2011 positive integers, how many are neither square nor cubic
• 5. How to calculate the sequence of 100, 8, 1, 1 / 4, () and 4, 7, 9, 4, 25, ()? 100、8、1、1/4、（） A.1/4 B.1/12 C.1/20 D.1/32 4、7、9、4、25、（） A.487 B.441 C.386 D.364
• 6. Fill in the nine numbers 3, 5, 7, 9, 11, 13, 15, 17 and 19 in the nine square, so that the sum of the three numbers in horizontal, vertical and oblique rows is equal?
• 7. What is one minus one? On the way, I heard two old men arguing, 1 - (- 1) =? Old man a said that I have one yuan (representing 1) and owe old man B one yuan (representing - 1). I (old man a) don't want you (old man b) to pay back (representing - {- 1}). Isn't that one? How can the answer be two?
• 8. Given that a and B are positive integers, and the difference between the square of a and the square of B is equal to the value of a and B?
• 9. Sum of sequence: an = 1 / N & # 178;;, sum the first n terms and Sn of sequence an It is better to give a detailed calculation process.
• 10. 13.14.15.16.17.18.19.20.21 how to fill in Jiugong grid
• 11. What is 2 minus 8
• 12. 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 are filled in the square, so that the sum of the three numbers in the horizontal, vertical and oblique rows is the same?
• 13. Sequence summation 1 / 1 * 2 + 1 / 2 * 3 + 1 / 3 * 4 +... + 1 / 9 ^ 10
• 14. If the square of a number is 64, what is the number?
• 15. How much is 31 degrees minus 15 degrees
• 16. A divided by 6 equals B. B, where a is a two digit number and B is a one digit number. How much does a equal?
• 17. The first four terms are 3 / 5, 4 / 8, 5 / 11, 6 / 14 Then a general formula of the sequence is
• 18. If 100 and 168 are added to a positive integer, two complete squares can be obtained. Then the positive integer is______ ．
• 19. How much is minus 8 minus 15 plus minus 9 minus 12?
• 20. C # how to realize such a three digit number, which is exactly equal to the cubic sum of each digit