√139 = 11.79 (4sf)
but, √369.83 = 19.231 (5sf)
The square root of 231 is: ± 15.198684
radical 231; no perfect squares factor into this number. It cant be simplified
cube root(231) = 6.13579244
257
Uranium-235 is a natural isotope with 143 neutrons. Uranium-231 is an artificial isotope with 139 neutrons.
Below the Root - novel - has 231 pages.
231 m2 is about 2,486.5 square feet.
21 x 11 = 231 -- There are 231 square feet on the floor. -- There are 231 square feet on the ceiling. -- There are a lot more square feet on the walls, but in order to calculate them, you need to know the height of the room.
6.13579244 (approximate, this is an irrational number)
231 square feet.
To determine factors of a number it is necessary to divide the number by prime numbers of increasing value. If there is no remainder then the prime number is a factor. The square root of 231 is approximately 15 so it is necessary to divide by all the prime numbers up to 13 (15 is not a prime number). 231 ÷ 2 leaves a remainder of 1 231 ÷ 3 divides exactly 77 times (which is 7 x 11 - both are prime numbers) 231 ÷ 5 leaves a remainder of 1 231 ÷ 7 divides exactly 33 times (which is 3 x 11 - both are prime numbers) 231 ÷ 11 divides exactly 21 times (which is 3 x 7 - both are prime numbers) 231 ÷ 13 leaves a remainder of 10 If we multiply together the three numbers that are shown to be factors 3 x 7 x 11 = 231 this confirms that there are no other factors of 231 except 1 and 231 itself. This last condition is true for every positive integer. 231 is divisible by 1, 3, 7, 11 and 231
231.