How Many Children Does the Man Have?

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The discussion revolves around a logic puzzle involving a host and his guest, who are trying to determine the number of children the host has based on limited information. The host reveals that the total number of children among four families is less than 18, with his family having the largest number. The guest learns that the product of the number of children in each family corresponds to the host's home number, which he has seen. After some calculations and questions, the guest deduces the host has five children. The conversation highlights the importance of the home number and the guest's final question about the smallest family's number of children, which leads to the unique solution. Participants discuss various combinations and the reasoning behind the guest's ability to solve the puzzle, emphasizing the significance of eliminating possibilities based on the given clues.
  • #31
I think I got it. Werg22 pushing us toward the right clue with every post he makes. I think I got it before I start reading second page. Here it is.
Guest knew the house number, that means he could eliminate some possibilities. But he needed more info.
Why? Because he had more than one possibility the product of which numbers gave him still the same house number. The way he asked his last question means that he had some possibilities with family A having 1 kid and with family A having more than 1 kid the product of which numbers would be equal.
Now let's see the possibilities with family A having more than 1 kid. There only 6 possibilities I found:
2345, 2346, 2347,2348, 2356, 2357, 2456. The product of which gives us 120, 144, 168, 192, 180, 210, 240 accordingly. I found only 2 possibilities starting with 1 kid and product of which numbers is matching with the product of my other 6 possibilities. It's 1456 and 1358. The product of these numbers gives us 120. Since the guest didn't need any more clues after his last question, there were more than 1 kid in family A (family with the lowest number of kids). That gives us the only one sequence of numbers 2345. The host has 5 kids.
 
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  • #32
wow that was great thinking!
 
  • #33
amazing
 

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