#61 - Trick Math Question
What is the largest number you can write with just 3 digits ?
9^9^9 (9 to the 9th power of 9).
Many People must have tough 999
#62 - Logical Maths Science Riddle
When Manish was three years old he hammered a nail into his favorite tree to mark his height. Six years later at age nine, Manish returned to see how much higher the nail was. If the tree grew by five centimeters each year, how much higher would the nail be?
The nail would be at the same height since trees grow at their tops.
#64 - Half Full Or Half Empty Riddle
There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?
Tilt the barrel until the wine barely touches the lip of the barrel. If the bottom of the barrel is visible then it is less than half full. If the barrel bottom is still completly coverd by the wine, then it is more than half full.
#66 - Phone Riddle
If you multiply all the numbers on the telephone, what is the answer?
0--Remember their is a zero!
#67 - Math Riddle
Find three whole, positive numbers that have the same answer when multiplied together as when added together.
1,2, & 3
1 x 2 x 3 = 6 and 1 + 2 + 3 = 6
#68 - Card Puzzle
In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?
Forty.
The number of decks is irrelevant; the answer is the same if one or one-hundred decks are used.
Any card drawn will be a A,2,3,4,5,6,7,8,9,10,J,Q, or K, so there are 13 possibilities each time a card is drawn.
The fastest way to draw a four of a kind is if the first four cards all have the same 'value.' The slowest way, which provides the solution, is to first draw 13 three of a kinds, and then one more card.
Since 13 x 3 + 1 = 40, if 40 cards are drawn it is guaranteed that those forty cards contain at least one four of a kind.
#70 - Oldest Direction Riddle
An electric train is traveling southwest at 95 miles per hour, and the wind is blowing north east at 95 miles per hour. In which direction does the smoke blow?
There is no smoke with an electric train.