Across
- 5. We can say that this number is "opposite" of prime
- 8. A name of numbers which are represent by 1, 5, 12, 22, 35
- 9. ... six - it is both a square and triangular number
- 10. The square number which is formed a four-by-four square
- 12. The greatest common ...
Down
- 1. A name of number in which the sum af all its proper divisors is equal to the number
- 2. A natural number with only two divisors
- 3. The .... of numbers
- 4. Numbers which can be formed into triangles of dots
- 6. The result of dividing a prime by any other natural number
- 7. It is the greatest common divisor of 24 and 36
- 11. The proper divisors of six are one, two and ...
- 13. The smalest Hexagonal number