4, 9, 25, 49
Assuming that 001, 080, etc are not allowed (that is a leading zero or two is not permitted), the smallest number with exactly three digits is 100. The largest number with exactly three digits is 999. So there are 999 - 100 + 1 = 900 numbers with exactly three digits.
To find the GCF of 3 numbers you first need to write them as their prime factors: 32 = 2x2x2x2x2 40 = 2x2x2x5 64 = 2x2x2x2x2x2 The next step is to identify any common factors. In this case, all three numbers have three 2s as prime factors. Multiply these together to find the GCF: 2x2x2 = 8 Thus the GCF of 32, 40 and 64 is 8.
Factors
to find factors of numbers.
Start by examining the factors of 990. You will find that 9, 10 and 11 are factors. You will find that 9 x 10 is 90, which is a factor of 990. You will find that if you multiply 90 by 11 that you will get 990. So 9 x 10 x 11 = 990.
9 The three factors are 1, 3, and 9. 9 The three factors are 1, 3, and 9.
Calculate their prime factors.
That depends what number you are trying to find the factors of - all those three numbers are factors of the number 18.
By factoring them. Prime numbers have only two factors. Composite numbers have three or more.
Assuming that 001, 080, etc are not allowed (that is a leading zero or two is not permitted), the smallest number with exactly three digits is 100. The largest number with exactly three digits is 999. So there are 999 - 100 + 1 = 900 numbers with exactly three digits.
30, 42, 66, 78
30, 42, 66, 78
Factors are whole numbers that will divide into other whole numbers leaving no remainders
All of them. Different numbers have different numbers of factors.
To find the prime factors all you need to do is find all factors, and identify which ones are prime numbers. 12=1*12=2*6=3*4 factors=1,2,3,4,6,12 Prime numbers can only be divided by 1 and the number itself. Thus the prime factors of 12 are 2 and 3 (1 is, by definition, not prime (i'm not exactly sure how to explain why))
Factors refer to whole numbers, not decimals.
To find the GCF of 3 numbers you first need to write them as their prime factors: 32 = 2x2x2x2x2 40 = 2x2x2x5 64 = 2x2x2x2x2x2 The next step is to identify any common factors. In this case, all three numbers have three 2s as prime factors. Multiply these together to find the GCF: 2x2x2 = 8 Thus the GCF of 32, 40 and 64 is 8.