What's the maximum number of choices you should give respondents in a Likert-type scale?

Question

I can't seem to find the answer any where.
My choices were
3
5
7
no maximum

I really appreciate you help.

I answered 5 and got the answer wrong, that is why I am confused.

Answer 1

This could be ambiguous; however, 7 or 9 would be the likely answer.

From Wikipedia:

A typical test item in a Likert scale is a statement. The respondent is asked to indicate his or her degree of agreement with the statement or any kind of subjective or objective evaluation of the statement. Traditionally a five-point scale is used, however many psychometricians advocate using a seven or nine point scale

http://en.wikipedia.org/wiki/Likert

Answer 2

5 is just a common number.

Taken from the link below:
The Likert-type scale has been used by persuasion researchers for over three decades. The original scale of this type was developed by Rensis Likert and is explained in his article, "A Technique for the Measurement of Attitudes," in Achieves of Psychology (1932). He reported very satisfactory reliability data for the scales developed with his procedure. In addition, Likert reported that results obtained from his scales compared favorably with those obtained by the "granddaddy" of the attitude scales--the Thurstone scale. Subsequent research has generally confirmed the fact that the Likert-type attitude scales are quite reliable and valid instruments for the measurement of attitude.

A Likert-type scale consists of a series of declarative statements. The subject is asked to indicate whether he agrees or disagrees with each statement. Commonly, five options are provided: "strongly gree," "agree," "undecided," "disagree," and "strongly disagree." Other Likert-type scales include four or six steps rather than five, excluding the undecided position.

Scales developed by the Likert method will ordinarily include from six to thirty declarative statements. Some of these statements will be worded in a positive manner and other will be worded in a negative manner.

http://www.jamescmccroskey.com/publications/25.htm

Answer 3

It's five. Two in one direction, two in the other, and one in the middle for the undecided.
Example: How much do you like cake? Please answer on the Lykert scale.
A) I love it!
B) I like it!
C) It's just average!
D) I don't like it!
E) I hate it!