In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Roundworms are fairly large worms that can grow to be _ or five inches long.
[EX A]: four

[EX Q]: Architectural shingles are twice or _ times as thick as ordinary shingles.
[EX A]: three

[EX Q]: Genes have _ main parts.
[EX A]:
two