As usually pronounced, there would only be two (2)syllables: re·marked (pronounced re·markt). Despite the 'ed' ending containing a vowel, the pronunciation assigns it a consonant pronunciation, hence it does not yield another syllable for the words where it is added if it is pronounced as a 't'. For words like "added", it gets a vowel sound ... add·ud (or add·ed) so it adds another syllable to those kind of words.
There are 4.
Two.
The word 'answer' has 2 syllables. An-swer.
There are four syllables in the word "usually".
The syllables in the word what is only 1 : "what".
The word has three syllables.
The word apotex has three syllables. The syllables in the word are a-po-tex.
There are three syllables in the word taxation. The syllables of the word are tax-a-tion.
The word prophets has two syllables. The syllables of the word are pro-phets.
The word burnol has two syllables. The syllables in the word are bur-nol.
The word unwrap has two syllables. The syllables in the word are un-wrap.
The word Guiana has three syllables. The syllables in the word are Gui-a-na.