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
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
A lot of 4 numbers make 28. You could have 4x7, or 2x6 + 2x8 or even 1+2+3+22 etc. The permuntations are vast.
1 x 244, 2 x 122, 4 x 61.
11
The rearrangement of 5 figure numbers will be 5x4x3x2x1 which is 120 combinations, when you don't repeat a number.