composite
77
35, 55, 77, 385 must be.
A prime number has only 2 factors: 1 and itself. 385 has a 5 in the ones place, so 5 is also a factor. Since 5 X 77 = 385, 77 is a factor, too. There might be other factors. 385 is a composite number because it has more factors than 1 and itself.
11, 35, 55, 77, 385
It is 385.
385
385
The required number is 35.
It is a composite number.
It is a composite number.284 is a composite number
94 is a composite number