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digits

I know I've seen these recently, but what was the answer? What number names a plant? Write down 4 odd digits that will add up to 19? Cheers. [I am not the author of this puzzle]
... any positive integer N. Therefore a googol = 10^100 is congruent to 1 mod 3. A googolplex has googol+1 digits, so the number of digits is congruent to 2 mod 3. So there are 2 digits before the firs...
...angular numbers are those that fit the formula n*(n+1)/2, like 1, 3, 6 and 10. In the following statement digits have been consistently replaced by capital letters, different letters being used for di...
...-10. (I know, I know - the Babylonians used 'base-60'. But their system didn't have 60 different types of digits, and so was not a 'true' base-60 system.) I mean, most human societies WERE made up o...
...ayed words each capital letter consistently represents a digit, with different letters used for different digits. Which number should be SENT? Ciao,...
On this line appears _ 0's , _ 1's, _2's, and _ 3's .
...Scientist magazine, 11 September 2004. by Adrian Somerfield. I have in mind three numbers each of three digits (no leading zero) in each of which one digit is 3. Of the following statements about th...
...ne showing a 2-digit number. After travelling for an hour the driver sees another milestone with the same digits in reverse order. After another hour the driver sees another milestone containing the s...
1. Say you only have the digits 1,2,3,4,5,6,7,8,9 which you must use exactly once in an equation. (*,-,/,+,^) How close to onehunderd can the end result be, if you have the constraint that the digit
Use the first n digits in the decimal expansion of pi to create an expression that approximates e (the base of the natural logarithms, 2.71828...). The expressions can use addition, subtraction, divis
Hello, Where could I test on-line the primality of numbers having more or less 500 digits? When I use the applet below I get sometimes : « X... is probably prime ». I would like to be 100% sure! R
Given that the letters in BUSH and KERRY stand for digits, what words can be made from the sums BUSH+KERRY=? KERRY-BUSH=? BUSH.KERRY=? And are there any cases where KERRY/BUSH has no remainder?
...0' (zero). To make it a little more challenging - your answer must contain the least possible number of digits....
... 8 9 20 30 22 23 24 25 26 27 28 11 33... « Smallest available integer which doesn't include any of the digits writing it's rank in the sequence. » Ex. : the first term of the sequence cannot be ...
[posted also in sci.math] Consider the string of digits formed by concatenating the natural numbers in base 10: C = '123456789101112131415...' Some integers (as consecutive digits) occur 'prematur
Hi! Occasionally I come across, in various magazines, puzzles like this: Arrange the digits 1-9 in such a way that their sum is 100. or Adding only 2 additions and 2 subtractions to the followin
Find all 3 digit numbers so that ANY power of it will have the same 3 digits at the end. ie. if its xyz, then xyz^n will end with xyz. ( here
... This problem is not one that Luc Kumps sent me and some others the solution on Nov. 2000 as only three digits are given. I would be interested in people posting lists however incomplete J.A.H. Hunt...
...ontinues: 3.1415929203539823008849557522124... It just looks like pi if you consider only the first 7 digits!...
... an alphametric equation, containing at least two different letters, that has only one way of mapping the digits onto the letters such that the equation is *incorrect*? For example in the following:...
...low it was another note reading: 'P.S. I thought I'd give you a fighting chance. The password is twelve digits long and is made up of 3 four letter long words timid isle – index – true lies â€...
A class of math students at an elementary school near my house was asked by the teacher to sort the digits 0-9 into 3 groups according to RULE A. About half the class submited the following: i) 1,
...) 6. mother (surgeon puzzle) 7. 79 ('89' years earlier, 2001 to 1922) 8. 11 (2-digit prime with identical digits) 9. horse (mule's parents: a donkey and a 'cow') 10. 5280 (feet in a mile) 11. capital ...
...ed Waldo, 'I'm thinking of three 3-digit numbers that add up to 1999.' 'Yes ... ' I ventured 'And all the digits are different, no repetition anywhere in the numbers.' 'Go on ... ' I groaned, trying t...
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