Can you fill the blank with the correct number?

6 30 870 756030 _____

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

In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
In House H1, The boy plays for Mexico Youth academy and the other child plays baseball.
In House H2, The boy Plays soccer for his school in Mexico and they recently have a newborn.

Can you prove that the probability of House-H1 having a girl child is more than that of House-H2?

Why 1729 is a magic number? Answer Logically.

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

What am I?

What number do you get when you multiply all of the numbers on a telephone's number pad?

What part of Turkey has the most feathers?

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?

10+10 and 11+11 can give you the same answer.

Explain how?