Restaurant

At "The untameable boar" they had thirty tables before the brawl, marked with natural numbers 2 to 31. Just two tables belonged to the lounge. So that the staff could find out at inventory which two they are, they used a trick. On the door of the lounge there was a plate with a number, which was not divisible by the numbers of the tables from the lounge, but it was divisible by the numbers of all the other tables. In addition, the numbers of the tables in the lounge followed each other. Which two numbers were they?

Final Answer:

a =  16
b =  17

Step-by-step explanation:

b=a+1=16+1=17



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