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LCM of two numbers which are multiple of three is 6. The LCM of all the numbers taken together is equal to the third number. If the sum of numbers is 21, find the numbers.

LCM of two numbers which are multiple of three is 6. The LCM of all the numbers taken together is equal to the third number. If the sum of numbers is 21, find the numbers. Correct Answer 3, 6, 12

Only set of numbers that fit all the criteria is 3, 6, and 12

Hence answer is (2)

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Zachary has invited his three buddies over to watch the basketball game on his wide-screen television. They are all hungry, but no one wants to leave to get food. Just as they are arguing about who should make the food run, a commercial comes on for a local pizze-ria that delivers. The phone number flashes on the screen briefly and they all try to remember it. By the time Zachary grabs a pen and paper, each of them recollects a different number.

#1 : All of the men agree that the first three numbers are 995.
#2 : Three of them agree that the fourth number is 9.
#3 : Three agree that the fifth number is 2.
#4 : Three agree that the sixth number is 6; three others agree that the seventh number is also 6.

Which of the numbers is most likely the telephone number of the pizzeria?