Brain Teasers
Insurance Salesman
An insurance salesman calls to the door of a house. He asks the lady about her family and wishes to know the ages of her children. She informs him that she has 3 children but does not wish to disclose information about them to a complete stranger. So he asks for a clue.
She tells him that: The product of their ages is 36 eg 2x3x6
But there are several possibilities, so he asks for another clue. She then tells him that the number of the house next door is the sum of their ages eg 2+3+6=11 But he still can't tell what their ages are so he asks for a final clue.
The lady then tells him that her eldest child plays the piano.
Straightaway he knows their ages and attempts to sell the woman insurance.
What are the ages of the woman's children and how did the salesman know?
She tells him that: The product of their ages is 36 eg 2x3x6
But there are several possibilities, so he asks for another clue. She then tells him that the number of the house next door is the sum of their ages eg 2+3+6=11 But he still can't tell what their ages are so he asks for a final clue.
The lady then tells him that her eldest child plays the piano.
Straightaway he knows their ages and attempts to sell the woman insurance.
What are the ages of the woman's children and how did the salesman know?
Answer
Clue 1 - all possible solution:1,1,36
1,2,18
1,3,12
1,4,9
1,6,6
2,2,9
2,3,6
3,3,4
clue 2:
1+1+36=38
1+2+18=21
1+3+12=16
1+4+9=14
1+6+6=13
2+2+9=13
2+3+6=11
3+3+4=10
Since he knows what number next door is, he must ask for a third clue only if the number is in 2 of the above ie
1+6+6=13
2+2+9=13
Clue 3:
Her eldest child plays the piano, therefore the eldest cannot be a twin, so her children are aged 2, 2 and 9.
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Comments
This is on the site somewhere else, and the argument is that two children could be born 9 months appart, so you can have two children of the same age with one being older. (There is always an older twin too) Then there is adoption ...
The eldest child could be a twin. The child that comes out first is still slightly older becoming the eldest child.
hey beelzebub...i think i know that name from somewhere, but i can't remember. Is it the hitchhikers guide to the universe? (best book ever written, btw)
C'mon - it's an oldie but a goodie!!
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