What number comes next in the series?

5 15 5 18 5 24 14 20 _

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?

What Deficiency does the below rebus represent?

VIT_MIN

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

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