USA HISTORY

Detailed explanation-1: -It’s true; the American English past tense form is spelled. In other varieties of English, both spelled and spelt are common.

Detailed explanation-2: -Spelt and spelled are two different spellings of the past tense of the verb “spell, ” used to refer to the act of writing or saying letters in a specific order to form a word. The spelling tends to vary based on whether you’re using UK or US English: In UK English, both “spelled” and “spelt” are commonly used.

Detailed explanation-3: -The number 30 is spelt as Thirty in English.