Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

No matter how little or how much you use me, you change me every month. What am I?

A father's child, a mother's child, yet no one's son.

Who am I?

What is full of holes but still holds water?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

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?

I’m tall when I’m young, and I’m short when I’m old. What am I?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

When it is alive we sing, when it is dead we clap our hands. What is it?