#211 - IAS Interview RIDDLE
How can you drop a raw egg from a height onto a concrete floor without cracking it?
Concrete floors are very hard to crack
#212 - Statement Question Riddle
Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.
The second statement
#213 - Sequence Quiz
Find Next Number in the Sequence
2 9 3 1 8 4 3 6 5 7 ?
'2'
This single sequence in fact consists of two sequences: the first sequence is 2-3-4-5-... and the second sequence is 9-18-36-72-... . To make the puzzle harder, all digits have been placed apart. Conclusion: the next term in the sequence is a '2'.
#214 - Puzzle Boat
At the local model boat club, four friends were talking about their boats.
There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.
Alan didn't have a yellow boat. Brian didn't have a red boat, but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.
Can you work out which friend had which coloured boats?
Alan had a red boat and a green boat.
Brian had a green boat and a blue boat.
Charles had a yellow boat and a red boat.
Darren had a blue boat and a yellow boat.
#215 - Building Puzzle
A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
20
Just count the nines in the numbers: 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99.
Note: 99 contains TWO nines!
#217 - November Maths Puzzle
The Puzzle: A girl, a boy, and a dog start walking down a road.
They start at the same time, from the same point, in the same direction.
The boy walks at 5 km/h, the girl at 6 km/h.
The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?
10km
Speed us 10km/h
#218 - Friday Riddle
The equation shown below is not correct:
26-63=1
Can you make the equation correct by moving just one symbol?
Move the 6 up just a little bit.
2pow(6) -63 =1
#219 - Unsolvable Riddle
In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly
It is not possible to guess only three fruits correctly: the fourth fruit is then correct too! So nobody has guessed three fruits correctly and 123-43-39-31 = 10 people have guessed four fruits correctly.
