What number belongs at the beginning of this sequence?
?, 3, 2, 3, 9, 2, 4, 8, 4, 3, 7, 6
3 ½.
If you break up the numbers into groups of 4, a,b,c,d, then 2 × |a – d| = |b – c|.
9 2 4 8 → 2 × |9 – 8| = |2 – 4|, or 2 × 1 = 2
I’m not sure this is the correct solution, but it’s the best I’ve found so far. Email me if you know of a better one.
3 ½.
If you break up the numbers into groups of 4, a,b,c,d, then 2 × |a – d| = |b – c|.
9 2 4 8 → 2 × |9 – 8| = |2 – 4|, or 2 × 1 = 2
I’m not sure this is the correct solution, but it’s the best I’ve found so far. Email me if you know of a better one.
What does this rebus represent?
Dancing Queen
An electric train is traveling on a 2000-mile journey from Chicago, IL to Los Angeles, CA. It has 16 cars with a total of 320 passengers. The weather is cloudy and cool, with a warm front approaching from the south. Which direction will the steam blow?
There is no steam. It’s an electric train.
There is no steam. It’s an electric train.
One tooth to bite,
What is it?
An axe.
Replace the letters with numbers to make this a valid mathematical equation.
COPS
CLOSE
CELLAR
CORPSE
CASE
+ COLLAR
--------
RECTOR
2730
29704
249918
278304
2104
+ 279918
--------
842678
2730
29704
249918
278304
2104
+ 279918
--------
842678
Using one or more addition, subtraction, multiplication or division operations, what formula using the numbers 3, 3, 8 and 8 equals 24?
8 ÷ (3 – (8 ÷ 3)) = 24
What plant becomes the name of a star by removing the first letter, becomes a number without the last letter and becomes a bird if the first and last letters are taken away?
Ivy
VY = VY Canis Majoris , one of the largest known stars
Ivy
VY = VY Canis Majoris , one of the largest known stars
If this site had a phone number, I would want it to be 743-3537. Why?
Because the numbers on a phone would spell the word RIDDLES.
Because the numbers on a phone would spell the word RIDDLES.
You’ve traveled a third of the way, yet you’re only halfway there.
Where are you going?
Hint: The answer applies in the US but not in Europe.
You’re in a build headed to the fourth floor. When you reach the second floor, you’ve gone one floor and have two more floors left, so you’re 1/3 of the way. But at the same time, you’re on the 2nd floor and have two more floors to get to the 4th floor, thus you’re halfway there.
This doesn’t work in Europe, because they typically refer to the “first floor” as the ground floor, and the first floor is one story up.
Thanks to Danny Llinas for submitting this.
You’re in a build headed to the fourth floor. When you reach the second floor, you’ve gone one floor and have two more floors left, so you’re 1/3 of the way. But at the same time, you’re on the 2nd floor and have two more floors to get to the 4th floor, thus you’re halfway there.
This doesn’t work in Europe, because they typically refer to the “first floor” as the ground floor, and the first floor is one story up.
Thanks to Danny Llinas for submitting this.
Solve this one carefully!
230 – 220 x 0.5 = ?
You probably won’t believe it, but the answer is 5! How can this be true?
The answer is 120, and 5! = 5 × 4 × 3 × 2 × 1 = 120
Credit to John May for this one.
The answer is 120, and 5! = 5 × 4 × 3 × 2 × 1 = 120
Credit to John May for this one.
