Spot 5 differences in two Christmas tree below:

Why do we preferably have round manhole covers and not square ones?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

What number divided by 4 is the same as that number minus 4?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

If,

Akriti = 631
Levis = 521
Sroti = 521
Aneel = 533
Then,
Sunil =?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?