360
This number would have to be a squared number as it only has 15 factors. The number I have calculated is 324 as the square root is 18
Any number between 20 and 22.36
700
440
400
The answer is 21. 21 X 21=441 and that's between 400 and 450
The number is 425
NO. 400 is not prime.400 is a composite number because it is even so definitely it has other factors aside from 1 and itself which is 2.
The number 1, 5, and 25 (also known as the common factors of 25 and 400) go into 25 and 400
The sum of the number of digits in all the numbers between 31 and 400 inclusive is 1041.
extensive trade with North African, Arabic, and Portuguese trading partners
There are two ways to solve this: Find the difference by subtracting the smaller number from the larger. 3600 - 400 = 3200 Divide the difference by two. 3200 / 2 = 1600 Add that quotient to the smaller number. 400 + 1600 = 2000 Secondly, the mid point is also the average (for most cases) 400+ 3600 = 4000 4000 / 2 = 2000