What occurs twice in a week, once in a year but never in a day?

What does below chemistry rebus means?

What country can make you shiver?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

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

What is it?

What do you see in the given picture?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _