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

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

If 21x = 79x, what is the value of x?

Solve the mathematical equation in the picture below.

Find the next number in the series below

21 32 54 87 131 ?

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

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?