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

? : 3839 :: 11 : 1209

How many times in a given day, minutes and hour clock comes in a straight line ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What you cannot hold but it is yours?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

What does this rebus means ?

PROG WORKRESS

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

What is the next shape from answers A, B, C, and D figure?