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1. Every of the three boys got a prize.
2. Each of the three boys got a prize.
According to M. Swan's Practical English Usage, each is used for two or more and every is used for three or more. No 1 conforms to this rule but to me No 2 sounds good. I am confused.
'every' is followed immediately by a singular noun, not a preposition.
It is used to refer to all the individual members of a group without exception : "The hotel assures every guest of personal attention.
"Every child of school age must be vaccinated before the first day of term."
and
• used before an amount to indicate something happening at specified intervals : "Tours are every thirty minutes."
"He had every third week off."
Each and Every 
Linear Mode
