Saturday, March 25, 2017

10-digit Number

Find a 10-digit number where the first digit is how many 0's there are in the number, the second digit is how many 1's in the number, the third digit is how many 2's, and so on, until the tenth digit which is how many 9's there are in the number.

Click below to see the answer.

Saturday, March 18, 2017

The Extra Dollar

Here is an old math puzzle that you can find many versions of online.

Two friends have a meal at a restaurant, and the bill is $25. The friends pay $15 each, which the waiter gives to the cashier. The cashier gives back $5 to the waiter. The friends tell the waiter to keeps $3 as a tip, so he hands back $1 to each of the two diners.

So, the friends paid $14 each for the meal, for a total of $28. The waiter kept $3, and that makes $31. Where did the extra dollar come from? Give yourself a moment to think about it before clicking below for the solution.

Saturday, March 11, 2017

Arranging Eights

Can you arrange eight 8's so that when added they will equal 1000? Click below to see the answer.

Saturday, March 4, 2017

A Unique Number

What is unique about the number 8,549,176,320? Click below to see the answer (and a bonus question).