What English word has three consecutive double letters?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

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?

what does this below rebus represent identXQQQQQME

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Find the missing number in the sequence below:

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?