"Thinks" is Third-person singular simple present indicative form of the verb "think"
The correct form of speech for "thinks" is a verb. For example, "She thinks about the problem."
The third form of the English word "receive" is "received".
The third form of shine is shone.
"Thinks" is the third-person form of "to think", which is a verb... so no, it is not a plural noun.
The third person form of arrive is "arrives."
Chao only evolve twice, so there is no third form.
One third is already in it's simplest form.
One third in decimal form is .3333 repeated
The closest match I can think of is "va", the third person singular present form of "ir". It means he/ she/you go.
One third is a fraction and cannot be expressed in remainder form.
The third person singular for "speak" is "speaks".