TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Cigarette smokers have up to a _ times higher incidence of bladder cancer than non-smokers.

SOLUTION: four

PROBLEM: Tensors have an associated rank from _ to infinity.

SOLUTION: zero

PROBLEM: Euglenoids also have _ flagella.

SOLUTION:
two