Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

I ask Joseph to pick any 5 cards out of a deck with no Jokers.

He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Jack can't see any of this). I look at the cards and I pick 1 card out and give it back to Joseph. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Jack.

Jack looks at the 4 cards i gave him, and says out loud which card Joseph is holding (suit and number). How?

The solution uses pure logic, not sleight of hand. All Jack needs to know is the order of the cards and what is on their face, nothing more.

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

What word is represented by this rebus?

Be active and find the killer in the picture Riddle below.

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?