TASK DEFINITION: Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.
PROBLEM: Lightning is ____ times hotter than the surface of the sun.

SOLUTION: three

PROBLEM: Banks hold ____ excess reserves and the public holds no currency.

SOLUTION: no

PROBLEM: African elephants have five toes on the front feet and ____ on the back.

SOLUTION:
three