Brain Teaser posted by Rosala (25/5/14)
http://web2.0calc.com/questions/brain-teaser_1
Puzzle posted by NinjaDevo (5/6/14)
What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?
Answer is here.
http://web2.0calc.com/questions/math-puzzle_1
I can't edit pages from the old forum so I'll start a new post!
CPhill's challenge puzzle (12May14)
http://web2.0calc.com/questions/tricky-puzzle-problem-from-cphill-can-you-work-it-out
Collision time puzzle (12May14)
http://web2.0calc.com/questions/does-everybody-know-1-1#rr105228
Jedithious's - Water in Glasses Puzzle
http://web2.0calc.com/questions/fraction-problem
4 digit reverse number puzzled
Brain Teaser posted by Rosala (25/5/14)
http://web2.0calc.com/questions/brain-teaser_1
Puzzle posted by NinjaDevo (5/6/14)
What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?
Answer is here.
http://web2.0calc.com/questions/math-puzzle_1
Money Puzzle
You borrow $50 from your mom and $50 from your dad to buy a T-shirt.
The T-shirt costs $97 and you receive $3 change.
You give $1 to your mom, $1 to your dad and keep $1 to yourself.
Now you owe $49 to your mother $49 to your father and the $1 you kept to yourself.
$49+$49+$1 = $99.
Where did the last dollar go?
Solution: http://web2.0calc.com/questions/math-question_54
by Rhino (12/6/14)
Another "where did the last dollar go."
3 men went to a hotel to rent a room, the cost of the room was $30. Each man paid $10 to the bellboy and proceeded to there room. After a little while the bellboy realized that there was a special on rooms that night and the price for the mens room should have been $25. On his way to the mens room to give them back $5 he was puzzled how he was going to split $5 as he had no change. He decided he would give them each $1 and keep the remaining $2 for himself. So each man originally paid $10, but after the bellboy gave each man $1 back, each man paid $9. 9 x 3 = $27 plus the $2 the bellboy put in his pocket equals $29. The original price for the room was $30. Where did the last dollar go?
Good luck with that...
This is not really a puzzle but it is in that vein.
Submitted anonymously 24/6/14
(1) Tap A can fill up an empty tank in 3 hours.Tap B can fill up the same empty tank in 4 hours.Tap C can fill up the same empty tank in 6 hours.How many hours will it take to fill up the empty tank if all the taps are turned on at the same time?
Answers:
(2) An empty tank has a capacity of 55.2 litres.Water flows from a Tap A at 3.6 litres per mimute and 2.4 litres per minute from a Tap B.Tap A was turned on first.Tap B was turned on 2 minutes later.The taps were turned off at the same time when the tank was completely filled without overflowing.How much water flowed from Tap B?
Answers:
Submitted by anonymous 25/6/14
Answers: http://web2.0calc.com/questions/algebra_890
Submitted anonymously 28/6/14
Answers:
(Well maybe 2 or 3 operators might be okay. Submitted by TakahiroMaeda (1/7/14)
Answers:
NinjaDevo 5/7/14
http://www.hawebmedia.com/activites/enrichment/stumpers/index.html
Maths Fallacy - can you find it? 7/7/14
http://web2.0calc.com/questions/step-1-let-a-b
Why is 2*10 and 2*11 the same thing?
http://web2.0calc.com/questions/why-is-2-10-and-2-11-the-same-thing
NUMBER COMBINATION PUZZLES:
Is it possible to get 873 from 100 75 50 25 10 6 (Answers on this page)
http://web2.0calc.com/questions/is-it-possible-to-get-873-from-100-75-50-25-10-6
Thankyou anonymous for providing the puzzle and thanks AzizHusein for providing the clever solution. 1/8/14
Does
mean anything to anyone?
Puzzles from Reinout-g (first posted 15/5/14)
Puzzle time!
http://web2.0calc.com/questions/logic-s-puzzle#rr106124
and a hint for the probability puzzle!
BRAIN TEASERS (posted by Reinout-g 15/5/2014)
Looking for a challenge?
Have a look at one of these two!
Scroll down to find the latest!
Mystery Number puzzle (8/8/14)
The mystery number has 3 digits is not divisable by 2 3 4 5 6 10
See solutions at:
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DragonSlayer's riddles. (16/8/14)
http://web2.0calc.com/questions/can-someone-help-me-out-on-this-riddle-please#r0
There is a new riddle post by DragonSlayer554.
http://web2.0calc.com/questions/funny-riddle
some are funny! Beware! You may want some more riddles!
Continuing after the War for Camelot, I continued the riddles. The following link is answering and asking riddles
http://web2.0calc.com/questions/funny-riddles-continued
Before the War for Camelot riddles
1) Prison riddle from Reinout-g (Thanks Reinout)
http://web2.0calc.com/questions/math-riddle_1
2) Car Park Puzzle from Stu (25/9/14)
What is the missing car park number in the car lot.
16, 06, 68, 88, __ , 98 ?
http://web2.0calc.com/questions/problem-solve-this-given-to-primary-school-children-in-china#r0
The $30 hotel puzzle. (Thanks Landry 24/9/14 )
This one has been around for ever - that is because it is so good!
I have hidden the answer so if you want the answer from a moderator you might have to beg. LOL
New Puzzle from Radio - no answer logged yet 9/10/14
http://web2.0calc.com/questions/random-puzzle-v2
2+2=5 Thanks Takahiro Maeda 15/10/14
Takahiro invites you to find the fallacy
http://web2.0calc.com/questions/what-is-2-2_28
√−1 2³ Σ Π and it was delicious. (17/10/14)
http://web2.0calc.com/questions/nbsp-nbsp-2-sup3-nbsp-sigma-nbsp-pi-nbsp-and-it-was-delicious
Great puzzle - Thanks flflvm97 (15/12/14)
http://web2.0calc.com/questions/flflvm-s-daily-question-day-3
Chess board number Puzzle (26/1/15)
Coin puzzle (31/1/15)
http://web2.0calc.com/questions/tricky-math-question
Code Puzzle from TakahiroMaeda (12/2/15)
http://web2.0calc.com/questions/anyone-likes-code-cracking
This number puzzle is just plain weird :) (10/4/15) Bertie has answered it.
http://web2.0calc.com/questions/brain-teaser_3#rr6
Carpet puzzle (25 April 2015)
http://web2.0calc.com/questions/good-luck-with-this-one
Where did the little square go. Great puzzle (3/5/14)
http://web2.0calc.com/questions/where-did-a-black-square-go
A number puzzle with a difference (9/5/15)
http://web2.0calc.com/questions/channel-21-news-public-service-announcement#rr2
A Time Puzzle. Thanks Civonamzuk (9/5/15)
Dividing land equally by shape and area Puzzle Thanks Civonamzuk and Alan (17/5/15)
Find the product (30/5/15)
http://web2.0calc.com/questions/m-a-m-b-m-c-m-z
Month cipher :) (16/8/15)
http://web2.0calc.com/questions/talk-about-math-let-s-do-ciphers_1