Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Identify the hidden meaning behind this picture?

What brings you down but never up?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

Decode below rebus
D
N
A
T
S , D

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?