What four weights can be used to balance from 1 to 30 pounds?

What does this rebus means ?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Decode below rebus
D
N
A
T
S , D

Why do people go to bed?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

In an office's desk, you find a unique method that shows the current day of the month. Two numbered cubes are used to depict the current date.

Can you find out the numbers on both the cubes so that each date can be mentioned using them?

Please note that you have to use both the cubes to display any date. Thus the 1st day must be represented by 01 and so on.

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?