45 and 65
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To determine the missing number in the sequence 20, 0.8, we need to identify the pattern. One possible pattern is that each number is being divided by 10. In this case, 0.8 divided by 10 equals 0.08. Therefore, the missing number would be 0.08.
No 38 is not a square number.
When you square a real number the answer is positive,
"Still" implies that the original number is a square number. In that case, the answer is as follows: There is no number such that it is a perfect sqiuare and that the number increased (or decreased) by 10 is also a perfect square. And if you do not limit it to perfect square then every non-negative number is a square with the number that is 10 more also being a square.
The square of a negative number is always positive. The square of -8 = 64, a rational number