Quick Answer: What Is The Nine Rule In Math?

What two numbers make 9?

Factors of 9: 1, 3, 9..

What does a 9 in numerology mean?

9 relates to wisdom and responsibility, and the ultimate goal of the number 9 is to serve humanity. This vibration has come to serve the world and make it a better place for all to live in. 9 represents human’s ‘earthly lesson’, which is ‘forgiveness’. Number 9 learns selflessness and compassion.

Why is 28 a perfect number?

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.

Which is the largest digit?

The smallest one-digit number is 1 and the largest one-digit number is 9.

Can you survive 80 percent burns?

Some publications [2,3] have suggested that survival rates reach 50% in young adults sustaining a Total Body Surface Area (TBSA) burned of 80% without inhalation injury. Recent U.S. data indicate a 69% mortality rate among patients with burns over 70% of TBSA [4].

Why do all numbers add up to 9?

A multiple of 9 is the product of 9 with any integer. Alternatively it is the sum of a certain number of 9’s. … When 9 is added to a number whose units/ones value is not zero, one of the ones together with the nine add on to each other to make up one tens.

How does the 1089 trick work?

The mystery is this: first, take any three digit number, where the first and last digits differ by two or more and reverse the number to produce a new one. Then subtract the smaller from the larger producing another new number. If you reverse this number and this time add the two, the result will always be 1089.

Why is 7 the perfect number?

Seven is the number of completeness and perfection (both physical and spiritual). It derives much of its meaning from being tied directly to God’s creation of all things. … The word ‘created’ is used 7 times describing God’s creative work (Genesis 1:1, 21, 27 three times; 2:3; 2:4).

How do you find the rule of 9?

For example, if they were burned on each hand and arm as well as the front trunk portion of the body, using the rule of nines, they’d estimate the burned area as 36 percent of a person’s body….What is the rule of nines?Body partPercentagePosterior trunk (back of the body)18 percent5 more rows•Jul 19, 2018

Why Is 9 the perfect number?

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. … Nine is a significant number in Norse Mythology.

Is 9 the most powerful number?

Number 9 is the strongest number among all numbers. … When number 9 is multiplied with other numbers, the result will always reduce to 9. For example, 9 × 2 = 18, and 1+8 = 9. Even 9×10 = 90 reduces to 9 since 9+0 = 9.

What divided by what gives you 9?

81Therefore, the answer to what divided by 9 equals 9 is 81. You can prove this by taking 81 and dividing it by 9, and you will see that the answer is 9. Tip: For future reference, when you are presented with a problem like “What divided by 9 equals 9?”, all you have to do is multiply the two known numbers together.

What are the 9 Rules of burns?

Rule of nines for burnsThe front and back of the head and neck equal 9% of the body’s surface area.The front and back of each arm and hand equal 9% of the body’s surface area.The chest equals 9% and the stomach equals 9% of the body’s surface area.The upper back equals 9% and the lower back equals 9% of the body’s surface area.More items…

What three numbers add up to 9?

2 + 7 = 9, cross out 2 and 7. 2.4 + 3 = 9, cross out 4, 3 and 2. 3. There are no other groups of numbers adding up to 9.

Is 9 the perfect number?

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.

What is the magic number trick?

There’s a similar math magic trick where you walk people through some simple arithmetic before guessing their number. Start with any counting number. Add 23, multiply by 3, subtract 6, and multiply by 3 one more time. Then add the digits together progressively until you have just one digit left.

Why is 6174 a magic number?

6174 is a harshad number, since it is divisible by the sum of its digits: 6174 is a 7-smooth number, i.e. none of its prime factors are greater than 7. 6174 can be written as the sum of the first three degrees of 18: 183 + 182 + 181 = 5832 + 324 + 18 = 6174.

What can equal 13?

Therefore there are subsequences for {3,6,9}….NumberRepeating Cycle of Sum of Digits of Multiples10{1,2,3,4,5,6,7,8,9}11{2,4,6,8,1,3,5,7,9}12{3,6,9,3,6,9,3,6,9}13{4,8,3,7,2,6,1,5,9}8 more rows

How is Tbsa determined?

To calculate the %TBSA (quotient), it is necessary to divide the burned surface area (Burned BSA) (numerator in cm2) by the total body surface area (Total BSA) (denominator in cm2).

What is the 9 trick in math?

A Mathemagical Trick Start by thinking of a number, any number. Now, multiply that number by 9. If the result is a multi-digit number, add its digits together to come up with a new number. If that new number is still a multi-digit number, add its digits together to come up with yet another new number.