What is the next number in this matchsticks series riddle?

If six children and two dogs were under an umbrella, how come none of them got wet?

At the local model boat club, four friends were talking about their boats.

There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.

Alan didn't have a yellow boat. Brian didn't have a red boat but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.

Can you work out which friend had which coloured boats?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

What does does this rebus picture means ?

Find the value of "?" in the ball picture Riddle below:

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

If it took eight men ten hours to build a wall, how long would it take four men to build it?