logicmathSam has got three daughters. The eldest daughter is the most honest girl in the universe and she always speaks truth. The middle daughter is a modest woman. She speaks truth and lies according to the situations. The youngest one never speaks truth. Not a single word she spoke was true and would never be true.
Sam brought a marriage proposal for one of his girls. It was John. John wanted to marry either the eldest or the youngest daughter of Sam as he can easily identify whether the girl speaks truth or lie!
John told his desire to Sam. However, Sam laid a condition. He told John that he will not say who the eldest, middle or youngest one is. Also, he allowed john to ask only one question to identify the eldest or youngest so he can marry one.
John asked one question and found the right girl. What was the question and whom should he pick?
He asks this question to one of the daughters.
If he asked this question to older daughter pointing at other two, he probably would know the youngest one! NO matter, she always speaks truth.
If he asked the question to middle one, probably he can choose either.
If he asked the youngest one, she always lies and he can find eldest one! No matter, he has to choose the youngest one based on the answer.

The question he asked is, ‘Is she older than her!’
He asks this question to one of the daughters.
If he asked this question to older daughter pointing at other two, he probably would know the youngest one! NO matter, she always speaks truth.
If he asked the question to middle one, probably he can choose either.
If he asked the youngest one, she always lies and he can find eldest one. No matter, he has to choose the youngest one based on the answer.

## Similar riddles

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logicmathshortDean Sam and Castiel are three brothers.
Interestingly their current age is prime.
What's more interesting that difference between their ages is also prime.
How old are they?

Sam : 2
Dean : 5
Castiel : 7
Age diff
7 - 2 = '5' is prime
7 - 5 = '2' is prime
5 - 2 = '3' is prime

logicmathshortThe digits 0-9(0,1,2,3,4,5,6,7,8,9) can be rearranged into 3628800 distinct 10 digits numbers.
How many of these numbers are prime?

None. The sum of numbers from 0-9(0,1,2,3,4,5,6,7,8,9) is 45 and therefore can be divisible by 3 and 9.

logicmathshortUsing eight eights and addition only, can you make 1000?

888 + 88 + 8 + 8 + 8 = 1000

logicmathHow can you divide a pizza into 8 equal slices using only 3 straight cuts?

Cut 1: Cut the pizza straight down the middle into two halves.
Cut 2: Keeping the two halves in the place, cut the pizza straight down the middle at right angles to the first cut (you will be left with 4 equal quarters)
Cut 3: Pile the 4 quarters on top of each other and cut through the middle of the pile. You will be left with 8 equal slices.

logicmathA train leaves from Halifax, Nova Scotia heading towards Vancouver, British Columbia at 120 km/h. Three hours later, a train leaves Vancouver heading towards Halifax at 180 km/h. Assume there's exactly 6000 kilometers between Vancouver and Halifax. When they meet, which train is closer to Halifax?

Both trains would be at the same spot when they meet therefore they are both equally close to Halifax.

logicmathshortFind three positive whole numbers that have the same answer added together or when multiplied together.

1,2, & 3.
1 x 2 x 3 = 6 and 1 + 2 + 3 = 6

logicmathshortA clock chimes 5 times in 4 seconds. How many times will it chime in 10 seconds?

11 times. It chimes at zero and then once every second for 10 seconds.

logicmathshortIf an electric train is going east at 60 miles an hour and there is a strong westerly wind, which way does the smoke from the train drift?

here is no smoke coming from electric trains.

logicmathshortFive add six is eleven, but six add seven is one. How is that possible?

When you are looking at a clock

cleandirtylogicmathshortWhat number should appear next in this sequence?
1 5 12 34 92 252 ?

688. Add the two previous numbers and multiply by 2.