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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 ...
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 honor.
As a biprime with proper divisors 1, 3 and 7, twenty-one has a prime aliquot sum of 11 within an aliquot sequence containing only one composite number (21, 11, 1, 0); it is the second composite number with an aliquot sum of 11, following 18. 21 is the first member of the second cluster of consecutive discrete semiprimes (21, 22), where the next such cluster is (33, 34, 35).
The first row has been interpreted as the prime numbers between 10 and 20 (i.e., 19, 17, 13, and 11), while a second row appears to add and subtract 1 from 10 and 20 (i.e., 9, 19, 21, and 11); the third row contains amounts that might be halves and doubles, though these are inconsistent. [14]
The number seven was apparently the Egyptian symbol of such ideas as perfection, effectiveness, and completeness. Examples. Seven thousand barrels of red beer were used to trick Sekhmet out of killing. In her search for her husband's pieces, the goddess Isis was guarded by seven scorpions. A legendary famine lasted seven years.
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Thus, in the case of 1.0, there are two significant figures, whereas 1 (without a decimal) has one significant figure. Among a number's significant digits, the most significant digit is the one with the greatest exponent value (the leftmost significant digit/figure), while the least significant digit is the one with the lowest exponent value ...
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