-6 !
90+84+65+71+90+74 = 474
The sum of 622 and 84 is 706.
84 multiplied by 90 is 7,560.
In the problem 56 + 28 = 84, 84 is the sum.
If two prime number have a sum of 54 they cannot have a sum of 84, and conversely.
GCF of 84 90 and 210 is 6.
average of 71%, 84% and 90% = 81.67% = (71% + 84% + 90%)/3 = 245%/3 = 81.67%
The GCF of 84, 90, and 210 is 6.
84 + 6 = 90
The sum of 84 and 72 is 156.
123
84/90 in simplest form is 14/15. :-)