TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Education wastes about _ thirds of the talent of society.

SOLUTION: two

PROBLEM: Cats There are thirty _ recognised species of cats and a whole host of subspecies or races.

SOLUTION: five

PROBLEM: Tusks grow up to _ inches a year and continue growing throughout the elephants' lifetime.

SOLUTION:
seven