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

Q: Pure water contains _ ions and is therefore a nonconductor .

A: no
****
Q: Glycolysis occurs in the cytoplasm and produces _ pyruvic acid.

A: two
****
Q: Indian corn has _ colors, they stand for North, South, East, and West.

A:
four
****