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21 is also the first non-trivial octagonal number. [5] It is the fifth Motzkin number, [6] and the seventeenth Padovan number (preceded by the terms 9, 12, and 16, where it is the sum of the first two of these). [7] In decimal, the number of two-digit prime numbers is twenty-one (a base in which 21 is the fourteenth Harshad number).
The number 88 visually resembles a lady next to another lady. Refer to 8 and 81 above. Players can reply with "wobble, wobble!" If 88 occurs in the last round, then "Two fat gentlemen" called in its place. 89 Nearly there 89 is one away from 90 (the end of the bingo numbers). Almost there 90 Top of the shop [5] 90 is the highest (top) number in ...
A 21-gun salute is the most commonly recognized of the customary gun salutes that are performed by the firing of cannon or artillery as a military honor. As naval customs evolved, 21 guns came to be fired for heads of state, or in exceptional circumstances for heads of government, with the number decreasing with the rank of the recipient of the ...
Angel numbers are repeating number sequences, often used as guides for deeper spiritual exploration. Ranging from 000 to 999 , each sequence carries its own distinct meaning and energy.
English number words include numerals and various words derived ... If a number is in the range 21 to 99, ... Thus "fifth" can mean the element between fourth and ...
Numeral or number prefixes are prefixes derived from numerals or ... although distinct word forms for that meaning are now mostly ... [21] sext-[22] hexa-[23 ...
Twenty-one, XXI or 21 may refer to: 21 (number) One of the years 21 BC, AD 21, 1921, 2021; Films.
Prohibiting calling out a series of numbers that sum to 21 (e.g. "6, 7, 8" or "10, 11") Examples of new rules that could be instated by a player forced to call 21: Swapping two numbers around (e.g. 3 and 13 are switched) Replacing a number with a humorous phrase (e.g. replacing 5 with "skin" - causing the sequence 1, 2, 3, "foreskin")