Riddle:
Which number would be bigger: the product of all of the numbers on your calculator, or the SUM of those numbers?
Answer: The sum would be bigger because multiplying any number by zero always results in zero. Yes, you have to include zero; it is also a number on your calculator.
Riddle:
What weighs more: 100 pounds of feathers or 1500 ounces of bricks?
Answer: 100 pounds of feathers weigh more than 1500 ounces of bricks because 100 pounds is equal to 1600 ounces, which is greater than 1500 ounces.
Riddle:
How many days are there in 4 years?
Answer: 1461, because one of the years is a leap year. 365 x 4= 1460 + 1= 1461
Riddle:
Ms. Dell is a math teacher at a high school. She always gives her students summer homework. One year, her students are SO tired of summer homework, and they want her to stop giving it to them. Ms. Dell promises a riddle to the students; whoever gets it right will not get summer homework. The riddle went like this: Add me to myself, and multiply me by four. Divide me by eight, and you will have me once more. What number am I? All of her students gave different answers, but nobody received any summer homework. How is that possible?
Answer: All numbers work with Ms. Dell's riddle! ((x + x) * 4) / 8 will always equal x.
Riddle:
Four friends-Chloe, Evelyn, Francesca, and Grace-went out for lunch. Someone asked them about their ages, and this is what they said: "Evelyn is three times older than Francesca. But three years ago, Francesca was a year younger than Chloe is now. And Grace is two times older than Francesca,". Can you rank the girls in order of their ages?
Answer: From oldest to youngest, the order is as follows: Evelyn, Grace, Francesca, and Chloe. Evelyn is three times older than Francesca, and Grace is two times older than Francesca. Evelyn is older than Grace because multiplying a number by three will result in a greater number than multiplying the number by two. Both of them are older than Francesca, but if it was three years ago that Francesca was a year younger than Chloe is now, then Francesca is two years older than Chloe. Therefore, Evelyn is the oldest, followed by Grace, then Francesca, and then Chloe.
Riddle:
A + A + A = 18 A + B + B = 10 B + CC + CC = 14 A + B x C = ? What is the value of each letter, and what number should replace the question mark?
Answer: A = 6, B = 2, C = 3, and the number that should replace the question mark is 12.
Riddle:
I have a certain number of candies, X. If I divide them into groups of three, then two candies will be left. If I divide them into groups of five, then three candies will be left. And if I divide them into groups of seven, then two candies will be left. How many candies do I have?
Answer: I have 23 candies.
Riddle:
The only thing you can use for this riddle is your brain! Add 1,000 to 40. Now, add 1,000. Then, add 30. Add 1,000 again. Now, add 20. Add 1,000 once more. Now, add 10. What is your answer?
Answer: Is it 5,000? Sorry, but that's wrong! The right answer is 4,100. Four 1,000s do add up to 4,000…but 40 + 30 + 20 + 10 is 100, not 1,000. And 4,000 + 100 is not 5,000; it's 4,100; therefore, the correct answer is 4,100.
Riddle:
Nicholas loves to collect pairs of shoes. All of his pairs of shoes are blue, except for three; all of them are white, except for three; all of them are brown, except for three; finally, all of them are beige, except for three. How many pairs of shoes does Nicholas have?
Answer: Nicholas has four pairs of shoes. Let's say that x is the number of pairs of shoes Nicholas has. x - 3 should be the term we need to use because the phrase "(color) except for three" means that three pairs of shoes in his collection are NOT of that color. And we should use this term four times because four colors are mentioned in the riddle. 4(x - 3) should be equal to x because once again, x represents the number of pairs of shoes. Here is the algebra: 4 (x - 3) = x 4x - 12 = x -12 = -3x 4 = x Therefore, there are four pairs of shoes in Nicholas' collection: one blue, one white, one brown, and one beige.
Riddle:
A triangle has sides of 13, 18 and 31 inches. What is the triangle's area?
Answer: Zero. The two shorter sides of a triangle, when added together (13+18=31), must be greater than the third or longest side (31) for it to be a triangle by definition. Therefore, the result would be two parallel lines with an area of 0.
Riddle:
Place three piles of matches on a table, one with 11 matches, the second with 7, and the third with 6. You are to move matches so that each pile holds 8 matches. You may add to any pile only as many matches as it already contains. All the matches must come from one other pile. For example, if a pile holds 6 matches, you may add 6 to it, no more or less.
You have three moves. How can you do it?
Answer: First pile to second; second to third; third to first:
| Pile | Initial number | First move | Second move | Third move |
| First | 11 | 11-7=4 | 4 | 4+4=8 |
| Second | 7 | 7+7=14 | 14-6=8 | 8 |
| Third | 6 | 6 | 6+6=12 | 12-4=8 |
Riddle:
The head of a whale is six feet long; his tail is as long as his head and half his body, and his body is half of his whole length. How long is the whale?
Answer: Forty-eight feet.
Riddle:
Jim was examining an angle measuring 14 and 1/2 degrees, using his magnifying glass that magnifies everything two times. Under the glass, how large would that angle measure?
Answer: 14 and 1/2 degrees. Explanation, angles remain constant when magnified. A square has 4-90 degree corners, if you zoom in (magnify) a square, it's still a square.
Riddle:
King Tut died 120 years after King Eros was born. Their combined age when they died was 100 years. King Eros died in the year 40 B.C. In what year was King Tut born?
Answer: King Tut was born in 20 B.C. There were 120 years between the birth of King Eros and the death of King Tut, but since their ages amounted to only 100 years, there must have been 20 years when neither existed. This would be a period between the death of King Eros, 40 B.C., and the birth of King Tut, 20 B.C.
Riddle:
At a children's party, 10 kids had juice, 8 kids had cake, and 6 kids had juice and cake.
How many kids were there at the party?
Answer: Tweleve kids. Six kids had juice and cake, leaving two out of the cake eaters that didn't have juice. As there were ten juicers, there must be twelve kids in total.
Riddle:
Robert and David played several golf matches against each other in a week. They played for a pizza at each match, but no pizzas were purchased until the end of the week. If at any time Robert and David had the same number of wins, those pizzas were canceled. Robert won four matches (but no pizzas), and David won three pizzas. How many rounds of golf were played?
Answer: Eleven, David won 7 matches, 4 to cancel out Robert's 4 wins, and 3 more to win the pizzas.
Riddle:
What is the smallest whole number that is equal to seven times the sum of its digits?
Answer: The answer to this math riddle is 21. You probably just guessed to answer this math riddle, which is fine, but you can also work it out algebraically. The two-digit number ab stands for 10a + b since the first digit represents 10s and the second represents units. If 10a + b = 7(a + b), then 10a + b = 7a + 7b, and so 3a = 6b, or, more simply, a = 2b. That is, the second digit must be twice the first. The smallest such number is 21.
Riddle:
There are two numbers whose product added to the sum of their squares is 109, and the difference of whose squares is 24. What are the two numbers?
Answer: 5 and 7.
(5)² = 25(7)² = 49(5x7)+25+49=10949-25=24
Riddle:
There is a certain club which is for men only. There are 600 men who belong to this club and 5% of these men wear one earring. Of the other 95% membership, half wear two earrings and the other half wear none. How many earrings are being worn in this club?
Answer: Six hundred. We know that 5%, or 30 of the men are wearing one earring. Of the other 95%, or 570, we know that half are wearing two earrings and the other half none. This is the same as if they all wore one.
Riddle:
Eight years ago, Bill was eight times the age of his son Bill Jr. Today, if you add their ages together, they add up to 52. How old are Bill and his son?
Answer: Bill is 40, and Bill Jr. is 12.
