Where is the transitive or intransitive verb in this sentence: Jessie knew all the answers on the test.

One way I teach my kiddos so they will remember this:

Transitive verbs TAKE an object --both have "t's".  Not all sentences have an object, so to find it do the following:

1.  Find the subject  (Jessie)

2. Find the verb  (knew)

3.  Ask who or what.  (answers) If you have an answer, you have an object.

So, since the sentence has an object...answers...then "knew" is a transitive verb.

To take it further, you ask the questions "to whom or what; for whom or what".  If you have an answer, you have an INDIRECT object as in the following sentence:

My father (subject) gave (verb) me (indirect object) a car (object) for my birthday.