TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Boolean operations is a method of combining _ meshes together.

SOLUTION: two

PROBLEM: Education wastes about _ thirds of the talent of society.

SOLUTION: two

PROBLEM: Cats have _ toes on their front paws, but only four touch the ground when walking.

SOLUTION:
five