How do you make the number 7 even without addition, subtraction, multiplication, or division?, Drop the "S" and "seven" becomes "even"., How can you write down eight eights so that they add up to one thousand?, 888 + 88 + 8 + 8 + 8 = 1000., How can you take 2 from 5 and leave 4?, F I V E Remove the 2 letters F and E from five and you have IV which is the Roman numeral for four., How many sides does a circle have?, Two. The inside and the outside., How many times can you subtract the number 5 from 25?, Once, because after you subtract 5 from 25 it becomes 20., When John was six years old he hammered a nail into his favorite tree to mark his height. Ten years later at age sixteen, John 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., I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now?, I am 40 and my daughter is 10., Lily is a lilypad in a small pond. Lilly doubles her size each day, On the 20th day she covers the whole pond. On what day was Lily half the size of the pond?, Day 19, it's not 10 because on day 20 she doubled from day 19, so 19 must be half the size of the pond., There is a clothing store in Bartlesville. The owner has devised his own method of pricing items. A vest costs $20, socks cost $25, a tie costs $15 and a blouse costs $30. Using the method, how much would a pair of underwear cost?, $45. The pricing method consists of charging $5 for each letter required to spell the item., One is to three as three is to five and five is to four and four is the magic number. What is the pattern?, One has three letters in the word three has five letters in it five has four letters and four has four letters in it (if you try more numbers they will always come back to the number four: so four is the magic number), The ages of a father and son add up to 66. The father's age is the son's age reversed. How old could they be? (3 possible solutions)., 51 and 15. 42 and 24. 60 and 06., What two whole, positive numbers have a one-digit answer when multiplied and a two-digit answer when added?, 1 and 9., 81 x 9 = 801. What must you do to make the this equation true?, Turn it upside down. 108 = 6 x 18., A mother has 6 girls and each of them has a brother. How many children are there?, 7. Each girl has the same brother., If 1=5, 2=15, 3=215, and 4=3215. What does 5 equal?, 5=1, because 1=5., How can you make the following equation true by drawing only one straight line: 5+5+5=550? Can you figure it out?, Draw a line on the first plus sign that turns it into a 4! The equation then becomes true: 545+5=550., If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?, Infinity! Technically you will never reach the door, as you can only move half the distance, no matter how small., I am a three digit number. My tens digit is five more than my ones digit. My hundreds digit is eight less than my tens digit. What number am I?, Number 194., How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. Iam twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put togeather. How old is the man's son?, Five., A sphere has three, a circle has two, and a point has zero. What is it?, Dimensions., A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?, Nine Years., Find the four digit number in which the first digit is one fourth of the last digit, the second digit is 6 times the first digit, and the third digit is the second digit plus 3. What is it?, 1694., What is the next number in the sequence? 2, 3, 5, 9, 17, _, 33. The pattern: Double the previous number and subtract 1., 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?, 2 and 2., What is the next number in the series? 7,645 5,764 4,576..., 6,457. The last digit is moved to the front to make the next number..

Math Riddles

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

)
Continue editing: ?