I was bored at work today (it being Monday morning) and I started thinking about my badge number.
It's nine digits long and contains all nine digits from 1 to 9. Remarkably, the whole number is divisible by 9 (no remainders!). If you remove the last digit from the number, it is divisible by 8. If you remove the next number, it is divisible by 7. And so on... Right down to the last number, which is, of course, divisible by 1.
What's my badge number?
I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
Monday, August 31, 2009
Friday, August 28, 2009
Crack the Code
Using the list of numbers and their accompanying codes, can you decipher the last code and determine the number on the last line?
Number Code
589 521
724 386
1346 9764
? 485
Number Code
589 521
724 386
1346 9764
? 485
Thursday, August 27, 2009
Meat and Potatoes
A mother has six children and five potatoes. How can she feed each an equal amount of potatoes?
No fractions, please.
No fractions, please.
Wednesday, August 26, 2009
Letter Equation Help
A commenter asked about the following letter equation. Can you help him?
What's the letter equation for
4 R in N A that F N?
What's the letter equation for
4 R in N A that F N?
Tuesday, August 25, 2009
Slide Right In
My brother says he is able to place a bottle in the middle of the room and by crawling on the floor, he can slide into it.
How can this be?
How can this be?
Monday, August 24, 2009
A Long Bus Ride
A doctor and a bus driver are both in love with the same woman, an attractive girl named Sarah. The bus driver had to go on a long bustrip that would last a week. Before he left, he gave Sarah seven apples. Why?
Friday, August 21, 2009
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