27 4 16 13 1 8 19 125 23
It isn't:
odds and evens
over 100 and under 100
prime and not prime
squared or not squared
single, double ot triple digit
there has to be three groups, and IT HAS TO BE MATHEMATICAL.
please helpWhat is a mathematical way of grouping these numbers?
8 27 125 are cubes of integers
4 16 are squares of integers
13 19 23 are prime numbers
1 could go into either the cubes or squares.What is a mathematical way of grouping these numbers?
My only guess is a combination of the suggestions you said they are not: prime, square and cube (in other words, x鹿, x虏, x鲁)
Primes: 13, 19, 23
Squares: 1, 4, 16
Cubes: 8, 27, 125
I have no other idea.
How about sequentially from lowest to highest?
1 4 8 13 16 19 23 27 125
Now you can find the median value, 16. There are other statistical operations you can perform once in this sequence.
The average is 26.22222222...
ProfRay
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