Puzzles – 1 – Penang Mensa

Q1. Can William, 70, marry his widow’s beautiful 20 year old sister Susan?
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Q2. A man lies dead in a field. The field is completely empty except for the grass and an unopened package beside him. No weapons are found and there was no one nearby within a 50km radius at the time of his death. How did he die?
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Q3. Johnny and Jonathan, 8 year old identical twins, were playing in an old garden shed. Johnny’s face was clean but Jonathan’s was covered with dirt. Yet it was Johnny who went to wash his face instead of Jonathan. How come?
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Q4. A man saw the sun rise in the west. He was not on the moon or in space, nor anywhere near the North or South Poles. He saw the real sun rise from the western horizon. How?
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Q5. A butcher had a brother who died. But while he was alive, the butcher’s brother never had a brother. How come?
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Q6. There are 3 sealed envelopes. One contains two $5 notes, another two $10 notes and the third a $5 and a $10. Unfortunately, all three envelopes have the wrong amount marked on the outside. How could you correct all three markings by opening only one envelope and looking at only one note?
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Q7. My daughter has many sisters. Each sister has the same number of brothers and sisters, but each brother has twice the number of sisters as brothers. How many sons and how many daughters have I got.
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Q8. If you drove a bus with 43 people on board from Chicago and stopped at Pittsburg to pick up 7 more people and drop off 5 passengers and at Cleveland to drop off 8 passengers and pick up 4 more and eventually arrive at Philade lphia 20 hours later, what’s the name of the driver?
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Q9. How many animals of each species did Moses take with him in the Ark?
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Q10. Some months have 30 days,some months have 31 days. How many months have 28 days?
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Q11. There are 2 pieces of string. Each piece is made of a different material and are of different lengths. Both pieces of string takes exactly 1 hour to burn from 1 end to the other. The speed of burning is not uniform throughout, so it can burn quickly first then slowly at the end or any random way.
If you are given only these 2 pieces of strings and a box of matches, how do you measure 45 mins? The solution only requires you to burn the strings. No other actions like cutting, measuring, etc is involved.
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Q12. A very rich farmer was getting bored and decided to count his cows. After counting them he discovered that the number of cows could be divided by 2,3,4,5,6,7,8,9 and 10. What is the MINIMAL number of cows this farmer has?
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Q13. The distance between two places X and Y is 105 km. A and B separately starts at the same time from X and Y respectively in the opposite direction. A is driving at the speed of 40 km/hour. After one hour and 45 minutes, A meets B, and then both A and B continue on their journey. After three minutes, A meets C who is driving in the opposite direction. C later overtakes B at place Z.
If A`s speed were 20 km/hour, and B’s speed were 2 km/hour faster than the original speed, and A and B were separately starting from X and Y at the same time, then A and B would have met at place Z. What is the speed of C?
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Q14. 4 men must cross a bridge on a dark night in 17 minutes. All four men begin on the same side of the bridge. There is one only one flashlight. A maximum of two people can be on the bridge at one time. Any party who crosses, either 1 or 2 person, must have the flashlight with them. The flashlight must be carried back and forth by a man,it cannot be thrown, etc. Each person walks at a different speed when alone but a pair must walk together and at the speed of the slower man’s pace. The time taken by each man to cross the bridge is:

Adam: – 1 minute to cross
Bono: – 2 minutes to cross
Carl:- 5 minutes to cross
Dave: – 10 minutes to cross

For example: if Adam and Dave walk across first, 10 minutes will have elapsed when they get to the other side of the bridge. If Larry then returns with the flashlight, this will take another 10 mins, a total of 20 minutes and the mission would have failed. Can you help them to cross the bridge in 17 minutes?
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Q15. Think carefully. Which comes first, chicken or egg?
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Disclaimer: The above questions are not my original but interesting ones I came across in other publications.Webmaster

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Answers to Puzzles – 1

A1. No. As Susan is his widow’s sister, it therefore means that William is dead.