Find the next number in the series.
1 10 24 43 67 ?

What can go up a chimney down, but can’t go down a chimney up?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

What will you call your mother's brother's brother-in-law?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

What is the next number in this matchsticks series riddle?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

How many letters are in the alphabet?