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The number 21 holds significance in various contexts. Mathematically, it is the product of the first two prime numbers (3 and 7) and is also a triangular number, representing a sum of the first six integers. In culture, 21 is often associated with coming of age, as it is the legal drinking age in many countries, symbolizing the transition to adulthood. Additionally, in games like blackjack, reaching 21 is the goal for players, making it a pivotal number in gambling contexts.
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What is the composite number for 21?
The only composite factor of 21 is 21.
What is Negative eight times the sum of a number and 21 is 96?
-8 × (number + 21) = 96 → number + 21 = 96 ÷ -8 → number = 96 ÷ -8 - 21 = -12 - 21 = -33
Is 21 a even number or a odd number?
21 is an odd composite number
Is the number 441 a prime number?
no, 21*21=441
Is number 21 prime or composite?
number 21 is prime
How many significant figures are in the number 21?
2 of them.
How many significant figures are there in the answer for 56.4 plus 0.8833 plus 21?
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
There are 45 people and 21 people like dogs what is the percent?
100(21/45) = 47 %, to the justified number of significant digits, like dogs in this sample.
What significant about the number 21?
Nothing particular. It is a triangular number but so are infinitely many other numbers. It is a semiprime but again, so are infinitely many.
What is the composite number for 21?
The only composite factor of 21 is 21.
What is Negative eight times the sum of a number and 21 is 96?
-8 × (number + 21) = 96 → number + 21 = 96 ÷ -8 → number = 96 ÷ -8 - 21 = -12 - 21 = -33
A number increased by two-thirds of the number is 35 what is the number?
21
Is 21 a even number or a odd number?
21 is an odd composite number
Is the number 441 a prime number?
no, 21*21=441
Is 21 a prime number of composite?
21 is a composite number
Why is 21 a prime number?
Who says it is? 21 is a composite number!
What number divided by a number equals 21?
it is 7x3=21
