What are the Perfect Numbers? Definition: A Perfect Number N is defined as any positive integer where the sum of its divisors minus the number itself equals the number. The first few of these, already known to the ancient Greeks, are 6, 28, 496, and 8128.
perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.
Three is the smallest number we need to create a pattern, the perfect combination of brevity and rhythm. It's a principle captured neatly in the Latin phrase omne trium perfectum: everything that comes in threes is perfect, or, every set of three is complete.
The number 9 is revered in Hinduism and considered a complete, perfected and divine number because it represents the end of a cycle in the decimal system, which originated from the Indian subcontinent as early as 3000 BC.
A number is perfect if all of its factors, including 1 but excluding itself, perfectly add up to the number you began with. 6, for example, is perfect, because its factors — 3, 2, and 1 — all sum up to 6. 28 is perfect too: 14, 7, 4, 2, and 1 add up to 28. But perfect numbers aren't common at all.
A Strong number is a number, where the sum of the factorial of the digits is equal to the number itself. 1, 2, 145, and 40585 are some examples of Strong numbers.
In magic. 1089 is widely used in magic tricks because it can be "produced" from any two three-digit numbers. This allows it to be used as the basis for a Magician's Choice.
The number nine is often associated with a divine connotation in the mystical thought and religions across the globe from ancient times. There is both, negativity and positivity in this mysterious nine! Not to talk of the numeral 9, which is often cited as a 'lucky number' for many these days!
Seven is considered lucky by many people. There are seven days of the week, seven continents and seven brides for seven brothers.
The sum of the digits of the number added to 9 is always equal to the sum of the digits of the result.
Throughout human history, the number 3 has always had a unique significance, but why? The ancient Greek philosopher, Pythagoras, postulated that the meaning behind numbers was deeply significant. In their eyes the number 3 was considered as the perfect number, the number of harmony, wisdom and understanding.
In the Bible, scholars claim that God created the world in six days and used the seventh day to rest. Because of this, the number seven is used to illustrate an idea of completeness throughout the Bible. In both Islam and Judaism, there are seven heavens.
HNO3 is used as a strong oxidizing agent. It can be manufactured by the catalytic oxidation of ammonia. It is a common reagent used in laboratories and an important chemical used in industries to manufacture explosives and fertilizers.
Numbers like 6 that equal the sum of their factors are called perfect numbers. 6 is the first perfect number . 4 is not a perfect number because the sum of its factors (besides 4 itself), 1+2, is less than 4. Numbers like 4 are known as deficient numbers .
In mathematics
. It is the smallest number with exactly nine divisors, leading 36 to be a highly composite number. Adding up some subsets of its divisors (e.g., 6, 12, and 18) gives 36; hence, it is a semiperfect number.
Twelve is the smallest of two known sublime numbers, numbers that has a perfect number of divisors, and the sum of its divisors is also a perfect number. Since there is a subset of 12's proper divisors that add up to 12 (all of them but with 4 excluded), 12 is a semiperfect number.
Seven was the most popular choice for both men and women. The survey revealed some other findings, too.
The top 10 are: 11, 7, 17, 27,19, 23, 12,13, 9 and 18. So how do you pick lucky numbers? For those who use birthdays, five of the most commonly drawn numbers are more than 31, meaning they are not likely to have picked them. Another approach that is commonly used is to look for numbers that have not come up in a while.
According to Berry, seeing 7, 77, and 777 is your guardian angel's way of telling you to stay strong and to continue moving forward on your journey — even through changes and obstacles. "The path ahead can become challenging, but the message is to keep a positive outlook in order to overcome anything," Berry says.
Lucky dates are 3, 6 and 9 for people born on the 3rd, 21st, or 30th of the month. Lucky day is Thursday, and Lucky color is purple, blue, red, pink. The lord of the number 4 is the planet Rahu. Lucky dates for people born on the 4th, 13, 22 or 31 of the month are 4, 13, 22 and 31.
The number 9 is the last of the single-digit numbers (which are known as cardinal numbers in numerology) and the highest in value.
1, 3, 7, 9, 13, 15, 21, 25, 31, 33, 37, 43, 49, 51, 63, 67, 69, 73, 75, 79, 87, 93, 99, 105, 111, 115, 127, 129, 133, 135, 141, 151, 159, 163, 169, 171, 189, 193, 195, 201, 205, 211, 219, 223, 231, 235, 237, 241, 259, 261, 267, 273, 283, 285, 289, 297, 303, 307, 319, 321, 327, ... (sequence A000959 in the OEIS).
This number is renowned for the following rule: Take any four-digit number, using at least two different digits (leading zeros are allowed). Arrange the digits in descending and then in ascending order to get two four-digit numbers, adding leading zeros if necessary. Subtract the smaller number from the bigger number.
1729, the Hardy-Ramanujan Number, is the smallest number which can be expressed as the sum of two different cubes in two different ways. 1729 is the sum of the cubes of 10 and 9 - cube of 10 is 1000 and cube of 9 is 729; adding the two numbers results in 1729.