Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I have teeth but i don't bite. Who Am I ?

The more it dries, the wetter it becomes. Can you tell what it is?

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

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

You can hear me, but you can't touch or see me.

What am I?

What part of the chicken has the most feathers?