What number comes next in the series?

5 15 5 18 5 24 14 20 _

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

How can you make number one disappear by adding something to it?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

What can you serve, but never eat?

What is the word or phrase?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?