Mathematics
A multi-layered brain snack by Alex Bellos, writes about mathematics.
Here are two puzzles I ordered on room service.
1) A number sandwich is a line of digits such that there is one digit sandwiched between the 1s, two digits sandwiched between the 2’s, three digits sandwiched between the 3’s, and so on. For example, 312132 is a number sandwich with the digits 1,2 and 3.
2) A number club sandwich is a number sandwich in which each digit appears exactly three times. The same rules as above apply: one digit is sandwiched between any two consecutive 1s, two digits are sandwiched between any two consecutive 2s, and so on...
As it’s the last column before Christmas, it would be remiss of me not to mention my latest book, So You Think You’ve Got Problems?, a compendium of 150 puzzles and the stories behind them. There are logic puzzles, word puzzles, lateral-thinking puzzles and much more.
Read more...
Recommended Reading
Source: The Guardian
A multi-layered brain snack by Alex Bellos, writes about mathematics.
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| Photo: etorres69/Getty Images/iStockphoto |
1) A number sandwich is a line of digits such that there is one digit sandwiched between the 1s, two digits sandwiched between the 2’s, three digits sandwiched between the 3’s, and so on. For example, 312132 is a number sandwich with the digits 1,2 and 3.
2) A number club sandwich is a number sandwich in which each digit appears exactly three times. The same rules as above apply: one digit is sandwiched between any two consecutive 1s, two digits are sandwiched between any two consecutive 2s, and so on...
As it’s the last column before Christmas, it would be remiss of me not to mention my latest book, So You Think You’ve Got Problems?, a compendium of 150 puzzles and the stories behind them. There are logic puzzles, word puzzles, lateral-thinking puzzles and much more.
Read more...
Recommended Reading
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| So You Think You've Got Problems?: Puzzles to flex, stretch and sharpen your mind |