Why Wine Glass Stem is so long?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Solve the mathematical equation in the picture below.

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Buy me, smell me or deliver me, I do not change.

Who am I?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.