My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

When it's bad luck to meet a black cat?

All Marigolds are flowers.
Few Flowers are used to make colors.
Therefore, some Marigold are used to make colors.

True Or False?

Move three sticks of the spiral below to form a square.

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

I taste better than I can smell. Who am I?

What's a single-digit number with no value?

What is the next number in the series?

15 29 56 108 208 ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

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.