Find the next number in the sequence

5 12 24 36 ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

How many triangles do you see in the picture puzzle below?

I always drive my customer away.

Who am I?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Find the next number in the series below

21 32 54 87 131 ?