num14

The choice when expressing numbers is between using a word to express the number (e.g., three) or a figure (e.g., 3).  Please check whether or not the number is expressed correctly.  Then  highlight the rule that governs the use of the number in this instance.

Participants were given 15 min to read the passage and study it using the assigned method.

The expression of the number is   correct     incorrect       because: