Roaring 20s - Numbers in between 20 and 30. 7-Enders - Numbers that have a "7" at the end, such as 7, 17, and 27. Even Tops - All Even Numbers such as 0, 2, 4, 6, 8, A, 11, 13, 15, 17, 19, 20, etc. Made of Ones - All numbers bigger than 0 are made of ones. Odd Blocks - All odd numbers such as 1, 3, 5, 7, 9, 10, etc. Step Squad Club - All Triangular Numbers such as Zero, One, Three, Six, Abb, etc. Prime Club - All numbers that can only make prime positions and no others such as Two, Three, Five, Seven, Ten, etc. Square Club - All Perfect Square Numbers. Cube Club - All Cube Numbers. Undercover 12s - All Unlucky Multiples of 12, such as 12, 24, and 120. Family of Threes - All Multiples of 3. Super Rectangle Club - Numbers that can make 6 or more rectangle arrays, such as Eleven, Seventeen. Nineteen, Twenty-Two, Twenty-Six, and Twenty-Abb. Super Duper Rectangle Club - Numbers that can make 8 or more rectangle arrays. Team of Tens - All Multiples of 10. Square With A Hole Club - Numbers that can make a square with a hole in it/Multiples of 4 that are bigger than Four himself. Rainbow Sevens Club - All Lucky Multiples of 7.
C2A.
