You need at least two numbers to find a GCF. On the off chance you meant 23 and 10, the GCF is 1.
The GCF of 2310 and 1225 is 35.
The GCF is 11.
2310 = 2310/1 or 23100/10 etc
55% of 2,310= 55% * 2310= 0.55 * 2310= 1,270.5
2310 = MMCCCX
It is: 2310
Yes - 2310/6 = 385
3/7 of 2310 is 990
2310 ÷ 3 = 770
2310 has 3 significant figures.
770
100+100+2310 = 2510