What is X?
3 6 10 15 X 28

Answer

21
The numbers increase by 3, 4, 5, 6 and 7 99 A

What is X?
3 6 10 15 X 28

Trend Riddles

Smaller than four, yet bigger than three, to make it your food, you must add an E.
What is it?

You just smashed open your piggy bank and counted 55 coins totaling $10.00.
There are more nickels than pennies, more dimes than nickels, and more quarters than dimes.
How many of each coin is there?

If:
1=3
2=3
3=5
4=4
5=4

So what does...

6=
7=

A hobo picks up cigarette butts from the ground and makes a cigarette with 4 butts. If he finds 16 cigarette butts, how many cigarettes can he make?

Three men eat dinner in a restaurant. The bill is $25. They each put in $10. The waiter brings back five ones. They give the waiter a $2 tip and keep $1 each. So now each person spent $9. If 3x9=$27, plus $2 for tip = $29, where did the other dollar go?

Latest riddles

In a stable there are men and horses. In all there are 22 heads and 72 feet.
How many men and how many horses are in the stable?

I flow from the mouth of Homer when he sees doughnuts.
What am I?

John wishes to get into a club. He knows that the club requiers a code. He stands around the corner and listens to two people get past the bouncer.
The bouncer tells Bert to de-code six, Bert reply's with three and gets in.
The bouncer then tells Fred to de-code Twelve, Fred reply's with six and gets in.
Right now John is quite confident that he can get in, he walks to the bouncer and is told to de-code ten. John happily replys with five but is not let in.
What is the number he should have said to get in and how do you de-code it?

A boy is stuck on a deserted island. There is a bridge to connect the island to the mainland. Halfway across the bridge there is a guard. The guard will not let anyone from the mainland to the island, or anyone from the island to the mainland. If the guard catches someone, he sends him or her back. The guard sleeps for 30 seconds and then is awake for 5 minutes. The island is surrounded by man-eating sharks, and the boy does not have anything with him except for his own shirt and his pants. It takes the boy 1 minute to cross the bridge. How does he cross the bridge without getting caught?

A boy buys a female mouse from the pet store and brings it home. If one mouse can give birth to 10 mouselets and after a week, those mouselets can give birth to 10 mouselets and after a week, those mouselets can give birth to 10 mouselets... so on and so on.
How many mice will the boy have after three months?