Can you name the number that would complete this peculiar eight-term sequence? 19, 5, 17, 21, 5, 14, 3, ? Solution This is supposed to be an easy sequence but you won’t be able to solve it if you only try to find some sort of mathematical patterns, which is a common mistake made by […]

Can you find a way to dissect the figure above in half into two pieces in such a way that both pieces have the same shape and size? Solution The solution is not complicated though it may not be obvious at first glance.

What is the next term in the following sequence? 7, 8, 5, 5, 3, 4, 4, ? Solution This type of puzzle is extremely easy once you found out the pattern involved. However, it can be frustrating to solve for some people. To know the next digit, you must first figure out the underlying pattern […]

Can you determine the next pattern in this pattern sequence? Solution In every row, the three images depict lines with 0, 1 and 2 intersections. That is, each row must contain an image with 0 intersection, an image with 1 intersection, and an image with 2 intersections. The number of intersections of the images for […]

I took 1 from 19 and I got 20. How was that possible? . . . . Solution (Click to Show) It’s in Roman numeral. So, taking away I (1) from XIX (19) leaves me with XX (20).

It’s easy for a rich man to become poor, but not the other way around. Transposing POOR to RICH in a game of word ladder isn’t as simple as well as you need ten steps to accomplish that. Can you figure out the steps? (Hint: One of the words is a contraction.) (Note: In a […]

One day, when Alice entered the looking, she noticed a sign depicting a peculiar group of symbols: “What are those symbols?” Alice mused. “They seem to be some sort of secret code or a foreign alphabet.” After some time, Alice realized the real meaning of the symbols. “It’s a sequence with a pattern!” Alice exclaimed. […]

Can you cut the E into seven pieces with just four straight cuts and reassemble the pieces into a square? Solution When I wrote that you need to cut it into seven pieces, it’s actually a hint. Did you figure it out? The letter “E” figure above is constructed using the seven tangram pieces. So, if you were able to figure […]

During third grade, my English teacher challenged us to answer some riddles. Here’s the first question: How do you put an elephant inside a refrigerator? There are three steps. I realized that this was part of a series of old riddles which are connected to each other. To not spoil my classmates’ fun, I refrained […]

Here’s another match equation puzzle. The illustration represents an incorrect Roman numerals equation (3 = 30). Move only two matches to make this equation valid. You cannot shift the position of the other matches. Solution (Click to Show) The solution involves Roman numerals and a multiplication sign. So, it can be read as: C = […]