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number Riddles

number Riddles and more.
Next Number
Riddle:
What is the next number in the sequence? 2, 3, 5, 9, 17, _
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A 2 Number Riddle
Riddle:
Take two numbers, such that the square of the first, plus the square of the second, shall equal 8; while the first, plus the product of the first and second, shall equal 6. What are the two numbers?
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What's the Next Number?
Riddle:
2, 3, 5, 9, 17, _ What is the next number in the sequence?
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The Magic Number Pattern
Riddle:
One is to three as three is to five and five is to four and four is the magic number. What is the pattern here?
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The Odd Number
Riddle:
I am an odd number. Take away a letter and I become even. What number am I?
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The Number Pyramid
Riddle:
Can you complete the pyramid by replacing X, Y and "?" with the correct number?
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Google Riddle - The Phone Number
Riddle:
You want Bob to have your phone number, but for some reason you can't ask him directly. You have to write Bob a note, and pass it to him through Lucy. Lucy can give you a note back with Bob's reply, but you don't want Lucy to know your phone number herself. What will you write on the note to Bob?
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What's the Least Number
Riddle:
What's the least number of chairs you would need around a table to sit four fathers, two grandfathers, and four sons?
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An Egg to a Friend
Riddle:
Mike has some chickens that have been laying him plenty of eggs. He wants to give away his eggs to several of his friends, but he wants to give them all the same number of eggs. He figures out that he needs to give 7 of his friends eggs for them to get the same amount, otherwise there is 1 extra egg left. What is the least number of eggs he needs for this to be true?
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A True Equation
Riddle:
Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.
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Square Plus Square
Riddle:
Take two numbers, such that the square of the first, plus the square of the second, shall equal 8; while the first, plus the product of the first and second, shall equal 6. What are the two numbers?
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Finish this sequence top to bottom...
Riddle:
Look at this sequence from top to bottom. What is the next number in the sequence? 1 11 21 1211 111221 312211 ?
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The Doors of Nine
Riddle:
A new medical building containing 100 offices had just been completed. Mark was hired to paint the numbers 1 to 100 on the doors. How many times will Mark have to paint the number nine?
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Plus vs. Times
Riddle:
Given two 2s, "plus" can be changed to "times" without changing the results: 2 + 2= 2 x 2. The solution with three numbers is easy too: 1 + 2 + 3= 1 x 2 x 3. Now find the answer for 4 numbers and for 5 numbers.
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Quizzical Calendar
Riddle:
A man was found dead while on his work trip abroad. The suspects were his colleagues Mason, Bob, Lisa, and Alex. On the calendar, 3, 4, 9, 10, 11 were written in blood. How should the detectives decode the numbers to find the killer?
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The Phone Pad
Riddle:
What number do you get when you multiply all of the numbers on a telephone's number pad?
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Everything and Nothing
Riddle:
Turn me on my side and I am everything. Cut me in half and I am nothing. What am I?
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Subtracting from 25
Riddle:
How many times can you subtract the number 5 from 25?
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How Many Animals Are Going to the River?
Riddle:
1 duck saw 4 elephants as it was going toward the river. Every elephant noticed 2 monkeys going to the river. Every monkey was carrying 1 dove in its paws. How many animals are going to the river?
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How High
Riddle:
How high would you have to count before you would use the letter A in the English language spelling of a whole number?
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How Many Pluses
Riddle:
How many pluses should we put between the digits of 987,654,321 to get a total of 99, and where?
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What Makes This Equation True?
Riddle:
If 1+9+8=1, what is 2+8+9?
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The Book Shelf
Riddle:
There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
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The Sum is Always Me
Riddle:
When I get multiplied by any number, the sum of the figures in the product is always me. What am I?
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