If the last digit doubled subtracted from the rest is a multiple of 7, the whole number is divisible by 7.
or
Divide 7 into it. If the answer has no remainder, the number is divisible by 7.
28 = 2 × 2 × 7 = 2² × 7.
As a product of its prime factors: 5*5*7 = 175
A number can be factored to determine whether it is prime or composite. A prime number has exactly 2 factors, 1 and the number itself. A composite number has more than two factors.
273 is divisible by 1, 3, 7, 13, 21, 39, 91, and 273. The number can be factored as 3 × 7 × 13. Therefore, it has these divisors along with the number itself and 1.
73 7*7*7 = 343
28 = 2 × 2 × 7 = 2² × 7.
If a number cannot be factored it is a prime number.
Yes. The number 973 can be factored as 7 x 139. *see related link
6x2-17x+7 = (2x-1)(3x-7) when factored
As a product of its prime factors: 5*5*7 = 175
9x2+2x-7 = (9x-7)(x+1) when factored
It is 7*7*7.
If you mean: 5x+35 then when factored it is 5(x+7)
A number can be factored to determine whether it is prime or composite. A prime number has exactly 2 factors, 1 and the number itself. A composite number has more than two factors.
1. 208 can be factored down to 2 x 2 x 2 x 2 x 13. 245 can be factored down to 5 x 7 x 7. Since the two numbers have no common factors, the only number that goes into both is 1.
You can determine the number you factored by re multiplying all the numbers. 2 • 3 = 6 • 5 = 30 • 7 = 210 • 11 = 2310. So the prime factorization of 2310 is 2 • 3 • 5 • 7 • 11.
It is called a composite number