14
GCF(14, 28, 42) = 14.
The answer will depend on the units for 14 x 28. Is that 14 ft x 28 ft or 14 miles x 28 miles, 14 metres x 28 metres? Who knows? Not me!
twenty five
25
The pattern is... add 7 then subtract 4. The next two numbers would be 45 & 41.
you add 10 to each number in the series of three. If you break the pattern into groups of three you will see 8-14-5 then 18-24-15 then 28-34. . . so 8+10=18+10=28, 14+10=24+10=34, 5+10=15+10=25, so continuing the pattern would be starting at 28: 28-34-25-38-44-35-48-54-45. . .
Each time you add 7 chairs perhaps?
There are infinitely many possible rules. One such is: Un = (-45n6 + 993n5 - 8385n4 + 33895n3 - 66930n2 + 59192n - 15360)/240 for n = 1, 2, 3, ...
14
28 2*14 = 28 1*28 = 28
28
14 is less than 28 or 14 < 28
14 is less than 28 or 14 < 28
The GCF of 14 and 28 is 14. Since 14 is a factor of 28, it is automatically the GCF.
The LCM of 14 and 28 is 28. The LCM of 7, 14 and 28 is 28.
The GCF for 28 14 is 14.