How do you go from 98 to 720 using just one letter?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Give it food and it will live; give it water and it will die.

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What is the fastest way to double your money?

A man died and leaves Rs.10,000 in his will. There are 6 beneficiaries- his 3 sons and their wives. The 3 wives receive Rs.3960 of which Priyanka gets Rs.100 more than Tanu and Neha gets Rs.100 more than Priyanka.
Pramod gets twice as much as his wife, Tushar gets the same as his wife, and Prashant gets 50% more than his wife.

Who is married to whom?