Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Find the 8 in the below-given Image.

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

A bomb exploded in a room full of married couples and no one died. How?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

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

Can you place three balls such that the equation shown in the picture holds true?