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

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

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?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

How many sides does a circle have?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?