286 = 2 x 11 x 13
2 x 2 x 7
A 3 or 4 digit number.
It can be: (5*6)-21 = 28
28 is not a prime number because it is divisible by 2, 4, 7, and 14. Prime numbers are only divisible by 1 and themselves without any other factors.
28
286 = 2 x 11 x 13
the product
It is not. When multiplying two whole numbers you need not be concerned about placing the decimal point in the answer.
How about: 2+6+8+12 = 28 as one example
This sort of number is a factor, which means 28 can be divided by the number and the quotient will have no remainder. Factors of 28 are 28, 14, 7, 4, 2, and 1.
1 and 28. 2 and 14. 4 and 7.
Only when their GCF is 2.
There are infinitely many pairs but probably the simplest to work out, and remember, is 1 * 306
2 x 2 x 7
A 3 or 4 digit number.
It can be: (5*6)-21 = 28