Dan has 75 eggs to pack into boxes.
Each box can hold 6 eggs.
How many boxes will Dan need?
A student has 2 shirts (black and white), 2 pants (black and white), and 2 hats (black and white) to choose from.
How many different outfits can be assembled?
There are 20 students in a class. 12 students have red stars and 8 students have green crosses; 6 students have nothing.
How many students have both?
Tom writes a total of forty words on five blank cards.
He writes nine words on each of the first four cards.
How many words does Tom write on the last card?
John read a 308-page book in 2 weeks. He read every day including weekends.
How quickly does John read?
Steve has three jackets, three pairs of socks and three shirts ready to wear on a particular day.
How many different outfits can Steve choose?
Jim is training for a race. He uses this map to find possible routes. The route must start at Jim's house (home) and end at the park. He wants to run between 4.8 and 5 kilometers.
Find the best route.
The diagram shows some of the results of a six-person contest.
An arrow pointing from one player to another means that the first player defeated the second player in their match. There are no draws.
How many matches are left to play?
David built a display stack using 8 layers of cans.
How many cans did he need to build the eight layer pyramid?
A leap year (or intercalary year) is a year containing one extra day.
The leap years are evenly divisible by 4.
How many leap years were in the 20th century (1901 - 2000)?
The Chinese Calendar is based on a twelve-year cycle.
Each year in the cycle corresponds to an animal:
Tiger, Rabbit, Dragon, Snake, Horse, Sheep (or Goat), Monkey, Rooster, Dog, Pig, Rat and Ox.
The order of the animals never changes.
The year 2010 in the Chinese calendar is the Year of the Tiger.
Which animal will mark the year 2110?
What is the smallest integer that can be written entirely with zeros and ones and is evenly divisible by 15?
If I put the numbers 1 to 6 on the faces of each of 4 dice such that the sum of two numbers on the opposite sides is always 7, which of the following dice is NOT correct?
X is a whole number.
X + 6 is greater than 33
X – 6 is less than 22
Find all the numbers that X could be.
With the cash in her pocket, Mrs. Smith can either exactly afford ice cream cones for all her family including the baby and animals OR one huge cigar for her beloved husband John. The cigar would cost $14.
Find the price of an ice cream cone.
NOTE: Smoking is harmful to your health.
Multiply the largest three-digit number by the smallest three-digit number and add 100.
What is the result?
I want to separate all the golden rings.
What is the smallest number of golden rings that need to be cut?
Each box is labeled incorrectly.
I want that the boxes are labeled correctly.
I can open only one box.
Which box should I choose?
There are 5 coins in the first pile, 8 in the second, 11 in the third, and 16 in the fourth.
What is the least number of coins that I have to move to make these four piles have the same number of coins?
How many steps are required to break the Swiss chocolate bar into 1 x 1 pieces?
You cannot break two or more pieces at once.
Tricky Equation Puzzle: the equation below is wrong:
102 - 99 = 1
Which numeral has to be moved to make the equation correct?
A cube consists of small black and white cubes.
A black face always touches a white face.
Find the number of pairs of faces that touch each other.
Roman numerals are the number system of Ancient Rome based on letters of the alphabet and where the position of the letters in the sequence affects their value.
For example, XCVII is 97 (100 – 10 + 7).
What is the value of CCCXLV?
In a family photo, I see 1 grandmother, 1 grandfather, 2 fathers, 2 mothers, 2 daughters, and 2 grandchildren.
What is the smallest number of people possible that are in the family photo?
A glass holds 180 ml of juice when it is one quarter empty.
How much does it hold when it is one quarter full?
Anna has ten times as many coins as Bill. When Anna gives Bill 9 coins, they each have the same number.
How many coins do they have together?
On a trip, there are 12 children and 2 adults per boat.
If a total of 98 people went on this boat trip, how many were children?
On a trip, there are 9 children and 2 adults per boat.
If a total of 99 people went on this boat trip, how many were children?
Jim Smith drinks a magic potion that reduces his weight by half.
He was 123kg before, so how heavy is he now?
John works from nine o'clock in the morning until half past six in the evening.
How many hours is that?
Roman numerals are a numeral system of Ancient Rome based on letters of the alphabet.
For example, CVII is 107 (100 + 7).
What is the value of CLVIII?
Roman numerals are a numeral system of Ancient Rome based on letters of the alphabet.
For example, CVII is 107 (100 + 7).
What is the value of CLIX?
Anna reads an average of three books per month.
She takes a break and does not read any books in August.
What is the average number of books that Anna reads in one year?
A fifth grade class sold 111 tickets for its class concert. Each ticket cost $6. The class donated half of the money to charity.
How much did the class donate to charity?
John has three pants, three pairs of socks, three hats, and three shirts ready to wear on a particular day.
How many different outfits can John choose?
Jim is training for a race. He uses this map to find possible routes. He choose 4 routes.
Find the shortest route.
The area of the first page of a book is 600 square centimeters.
What is the area of all pages of the 50-page book on one side?
Anna wants to earn exactly 44 points.
The ducks give different points.
How many ducks will she take?
Evguenia is 9 years old.
What is the largest number of birthdays she can celebrate in 2,222 consecutive days?
The pages of a book are consecutively numbered from 1 through 999.
How many digits are there in this numbering?
Each child in a family has at least 2 brothers and 3 sisters.
What is the smallest number of children their parents might have?
The five pieces of chain shown must be joined into a long chain.
How many rings should be opened and closed?
Inspired by Boris Kordemsky
Benny Bunny starts jumping from a hole.
It takes six seconds for every 10 jumps. How much time does it take him to do 45 jumps?
Each of the 20 Knights of the Round Table clinked his mug with the Knights on his left and right.
How many times did mugs clink?
Gerry's circular garden is 1200 m in diameter and has no fence.
How far can a wolf run into the garden?
After a 2-month tennis course, three friends recorded their weight loss.
Anna - 600 g
Bob - 1kg 300 g
Cindy - 0.8kg
How much weight have they lost between them?
How long is a rope that is 8 meters shorter than another rope that is 5 times the length of the first rope?
Gerry and Jane spent a week on an island and they ate only coconuts.
Gerry had already eaten half of the coconuts when Jane ate half of the remaining coconuts plus three more.
There are no coconuts left.
Who ate more coconuts?
Seven kids play some games of Chess.
If each of them plays just one game with each of the others, what is the total number of games played?
Ten apples are distributed among Anna, Bill, Cindy, and Dan such that everybody gets at least two, and each girl gets one apple more than Dan.
How many apples do the girls get in total?
Fifteen students took part in a math competition.
The number of children who finished behind Jane was six times as large as the number of children who were more successful than her.
In which place did Jane finish?
A puppy sleeps a total of 100 hours per week of 7 days.
He usually sleeps 1 hour more on Saturday and Sunday than any other day of the week.
On average, how much does he sleep on Monday?
Anna, Bill, and Cooper are friends.
If the following statements are all true, which of them is the youngest?
Anna is the oldest.
Bill is not the oldest.
Cooper is not the youngest.
If Jane has eight dimes, and Gerry has the same amount in nickels, how many coins does Gerry have?
Penny = 1 cent.
Nickel = 5 cents.
Dime = 10 cents.
Quarter = 25 cents.
Gerry bought Benny Bunny for $9, sold it for $10, bought it back for $11, then sold it for $12.
How much profit did he make?
Joe, Jim, and John bought a large chocolate bar.
Joe cut it into 6 equal pieces and shared it with the others.
Joe had as many pieces as the other two boys combined. Jim had more than John.
How many pieces did Jim get?
Note:
(1) An unequal sharing does not make strong friendships.
(2) Overeating is harmful for your health.
Each boy receives 2 presents and each girl receives twice as many as a boy.
How many presents do they receive in total?
On every even-numbered day, John eats 2 pears. He eats 3 apples on every odd-numbered day.
How many pieces of fruits does he eat in the month of April?
On an island, kids always tell the truth and the adults always lie.
Which of them could make the following statement?
"I always tell the truth."
Five friends ate at a restaurant and agreed to share the bill equally. Because Jane forgot her money, each of her friends paid an extra amount to cover her portion of the total bill of $80.
How much extra does each friend pay?
The photograph courtesy of Roland Sauter
Jane has been taking pictures of birds sitting on a fence. This is a picture taken at 2:00 PM. At 2:04 PM, three birds flew away, but 2 of them flew back 3 minutes later.
At 2:10 PM, a hunter tried to shoot one of them, but he missed his shot.
How many birds were on the fence at the end of the story?
How many 200-milliliter glasses of juice are needed to completely fill a one-liter bottle?
There are 1000 milliliters in 1 liter.
I have a 5-litre bucket and two 3-litre buckets, all of which are half filled with water.
How much water is there in the buckets?
Johnny is a very poor communicator and a very fussy eater. If given a plate with any foodstuff that he doesn't like, he rejects the whole plate and sulks.
He rejects 'spam, pizza & chips'.
He accepts 'sausage, mash & spam'.
He accepts 'pie, spam, & beans'.
He accepts 'egg, chips, & spam'.
He rejects 'spam, beans, & pizza'.
Which food item is he actually rejecting?
Author: Leslie Green
I notch up 78987 kilometers on my odometer.
After how many more kilometers will all five digits of the odometer be the same for the first time?
A rich man gave each of his 3 sons 3 books, each of his 4 daughters 4 books, each of his 5 grandsons 5 books, and each of his 6 granddaughters 6 books.
How many books did the man give his children / grandchildren?
Logic Riddle
In a family, each child has at least two brothers, three sisters, a father, a mother, three uncles and two aunts.
The picture shows only a part of the family.
What is the smallest possible number of people mentioned above?
Jane buys two pieces of pizza that cost four dollars and sixty-four cents each, and pays with two five-dollar bills.
How many cents change should she receive?
If seven pencils cost one dollar and 19 cents in all and each pencil costs the same amount, how many cents would four pencils cost?
Gerry has $7, Jane $20, and Kate as much as Gerry and Jane together.
If they put their money together and share it equally among them, how much does each kid get?
What is the number we started with?
What rule is used for the In-Out machine? 
Which number divided by 2001 is the same as that number multiplied by 2001?
What is the maximum possible sum of digits on a digital clock between the midnight and noon?
I multiply three positive integers that are greater than 1 and get 333. 
If 3 of every 150 astronauts are NOT married, then what percentage of all astronauts are married?
How many different sets of two positive integers add up to the number 33? 
In how many ways can you choose 4 consecutive numbers from the first 8 positive integers?
The weight limit for an elevator is 800kg. 
Which shape must be placed in the empty space?
Find the average of the largest six numbers in the table. 
Pascal's triangle. 
How many 2-digit numbers do not contain a zero?
Bob is exactly 499 months old. 
For a school show, 880 chairs are arranged equally in 44 rows. 
A box holds 22 apples. 
What is the letter, which goes before O?
If I delete a letter in a word, then only one is left. 
My dad's sister's son's father is
Which one of the four designs is least like the other three?
This year, in what month does the 111th day occur?
If Y = 3 and M = 2, what might MY be?
I am exactly in the middle between the two products of (9 and 2) and (8 and 5). 
Choose a word that ends, includes and starts with letters E, N, D correspondingly.
Which word has the largest sum of its letters' numbers?
How many eggs can the hens put in an empty basket?
In a spy code, the digits 2 8 9 means 10. 
If Mrs. Smith has two twins, three triplets and four quadruplets; how many children does she have?