Can you replace the question mark with the correct number?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

What does a man do only once in his lifetime, but women do once a year after they are 29?

Why Aeroplane windows are round?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Solve The below Equation:

ALFA + BETA + GAMA = DELTA