1. 1+9=10
2. 2+8=10
3. 3+7=10
4. 4+6=10
5. 5+5=10
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it is an even number it is composite number it is a square number it is a number between 10 and 100 it has factors and multiples and it has a prime factorization.................................
It is the 6th prime number.
26 = 64
composite even deficient
The number 11 is a prime number and it`s factors are 1 and 11