Number Puzzles

10-digit Number
10-digit Number
Find a 10-digit number where the first digit is how many zeros in the number, the second digit... Try Puzzle >>
1996
1996
Use the numerals 1, 9, 9 and 6 exactly in that order to make the following numbers: 28, 32,... Try Puzzle >>
24 from 8,8,3,3
24 from 8,8,3,3
How can I get the answer 24 by only using the numbers 8,8,3,3. You can use add, subtract,... Try Puzzle >>
5-digit Number
5-digit Number
What 5-digit number has the following features: If we put the numeral 1 at the beginning,... Try Puzzle >>
9-digit Number
9-digit Number
Find a 9-digit number: It must have all 9 digits from 1 to 9 It must be evenly divisible... Try Puzzle >>
A Unique Number
A Unique Number
What is unique about 8549176320 ? Try Puzzle >>
A Weighty Problem
A Weighty Problem
I have ten boxes which I want to pack into crates. Each crate can carry a maximum of 25 kg. But... Try Puzzle >>
Absolutely Christmas Crackers
Absolutely Christmas Crackers
Last month I sent off for one of those kits which you can use to make your own Christmas Crackers.... Try Puzzle >>
Alphabetical Order
Alphabetical Order
Find a number with its letters in alphabetical order. Example: "five" has "fiv"... Try Puzzle >>
Birthday
Birthday
When asked about his birthday, a man said: "The day before yesterday I was only 25... Try Puzzle >>
Eight eights
Eight eights
Using 8 exactly eight times to make a 1000. a) Using only + - * / b) Also allowing... Try Puzzle >>
Five Card Trick
Five Card Trick
I am thinking of one of these five cards: You have to try to find out which one I am... Try Puzzle >>
Four Fours
Four Fours
A popular mathematical pastime: Use exactly four 4's to form every integer from 0... Try Puzzle >>
Four-Digit Whole Number
Four-Digit Whole Number
There is one four-digit whole number n, such that the last four digits of n2 are... Try Puzzle >>
Fraction
Fraction
Can you arrange the numerals 1 to 9 (1, 2, 3, 4, 5, 6, 7, 8 and 9) in a single fraction that... Try Puzzle >>
How Old is Granny
How Old is Granny
Tom asked his Granny how old she was. Rather than giving him a straight answer, she replied: ... Try Puzzle >>
It Could Be Verse
It Could Be Verse
Horace bought some cakes today As explained in this song. Now, as he took his... Try Puzzle >>
Magic Square 111
Magic Square 111
The box below is a Magic Square. This means that the numbers add up to the same total in every... Try Puzzle >>
Magic Square Game
Magic Square Game
Try Dubi Kaufmann's Magic... Try Puzzle >>
Make the Number 100
Make the Number 100
Using the numerals 1,7,7,7 and 7 (a "1" and four "7"s) create the number... Try Puzzle >>
MatheMusic
MatheMusic
Hungry Horace went into the Music Shop to buy some musical sweets which they were selling. There... Try Puzzle >>
Mince Pie Madness
Mince Pie Madness
One afternoon, Hungry Horace made a large number of mince pies for his Christmas party the... Try Puzzle >>
Missing Number 1
Missing Number 1
What is the missing number in Triangle Four? Try Puzzle >>
Missing Number 2
Missing Number 2
Try Puzzle >>
Mobile Digits
Mobile Digits
You have a mobile with a keyboard which consists of 10 digits and two symbols, [#] and [*],... Try Puzzle >>
Newspaper Caper
Newspaper Caper
Here's a newspaper made of 8 large sheets of paper folded in half. The newspaper has 32... Try Puzzle >>
Number Sequences
Number Sequences
There are infinitely many formulas that will fit any finite series. Try to guess the next... Try Puzzle >>
One and a Half Hens
One and a Half Hens
If one and a half hens lay one and a half eggs in one and a half days, how many eggs does one... Try Puzzle >>
Open The Safe
Open The Safe
Ludwig Bump runs the bank in Mathsville. You have to help him, though, because he has forgotten... Try Puzzle >>
Peas Galore
Peas Galore
At a school fete people were asked to guess how many peas there were in a jar. No one... Try Puzzle >>
Race 5 at a Time
Race 5 at a Time
25 people enter the picnic race. But the track is narrow and only 5 can race at a time.... Try Puzzle >>
Root Jigsaw
Root Jigsaw
Two of the four jigsaw tiles have the same sum of their roots. Find these tiles. Try Puzzle >>
Sides Reversed Is
Sides Reversed Is
Hungry Horace was copying down his Mathematics Homework the other day, but because he was in... Try Puzzle >>
Squares on a Chess Board
Squares on a Chess Board
How many squares are there on a chess board ... ? Try Puzzle >>
Sum Of Digits is 43
Sum Of Digits is 43
I am thinking of a 6-digit number. The sum of the digits is 43. And only two of the following... Try Puzzle >>
The Make-You-Very-Cross Number
The Make-You-Very-Cross Number
Try Puzzle >>
The Pearl Necklace
The Pearl Necklace
A pearl necklace has 33 pearls with the largest and most valuable in the middle. Starting... Try Puzzle >>
The Strange Mind Of Eureka Blip
The Strange Mind Of Eureka Blip
Welcome to the strange mind of Eureka Blip. He does not always think the same way as we... Try Puzzle >>
Thinking Chocolate
Thinking Chocolate
There were 100 chocolates in a box. The box was passed down along a row of people. The... Try Puzzle >>
Two Consecutive Numbers
Two Consecutive Numbers
A Teacher thinks of two consecutive numbers in the range 1 to 10, and tells Alex one of the... Try Puzzle >>
What is the Pattern
What is the Pattern
Write down the next line in the following pattern: Try Puzzle >>
What The Students Know
What The Students Know
A teacher says: The first student knows their product and the other one knows their... Try Puzzle >>
Where Did the Dollar Come From ?
Where Did the Dollar Come From ?
Two friends have a nice meal together, and the bill is $25 The friends pay $15 each, which... Try Puzzle >>
Where Did the Dollar Go ?
Where Did the Dollar Go ?
Three friends have a nice meal together, and the bill is $25 The three friends pay $10 each,... Try Puzzle >>