22, 28, 82 and 88.
((7-2) * 4) + 8 = (5 * 4) + 8 = 20 + 8 = 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.
28/42
7, 14, 28, 56, 903
22, 28, 82 and 88.
((7-2) * 4) + 8 = (5 * 4) + 8 = 20 + 8 = 28
This is the way to do it.. Factorize 4,28 using prime numbers only (Prime factorization) till you get 1,1. The prime numbers used are 2,2 & 7 Therefore HCF(4,28)= 2*2*7 = 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.
28/42
7, 14, 28, 56, 903
2 x 14 = 28
2X2X2+1X3=28
Among the factors of 28, 2 and 7 are the only prime numbers.
To make 28 using the numbers 1, 2, 3, and 4, you can use the following mathematical operations: (4 x 3) + 2 + 1 = 12 + 2 + 1 = 15. Then, add 13 to 15 to get 28: 15 + 13 = 28.
How about: 2+6+8+12 = 28 as one example
28