Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Complete the table series riddle by finding the number that can replace "??".

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

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Can you spot the hidden girl in the picture below?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

What is the below Rebus indicate?