"No one" has two syllables. You can tell by placing your hand under your chin and then saying the word. The number of times your jaw lowers is the number of syllables in the word.
The word tent has one syllables.
There are two syllables in the word "pouches."
The word climbed has one syllables.
The word pearls has one syllables.
Pie has one syllables.
There is one syllables in clap.
Two syllables.
One
aren't has one syllable. Are not has two syllables, one for each word.
The word curled has one syllable.
There are definitely TWO syllables in the word "marched".
One