Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Why do we preferably have round manhole covers and not square ones?

Solve the rebus riddle in the picture below.

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Why are televisions attracted to people?

Replace the question mark with the correct number below.

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

Kohli and Dhoni decided to have a paintball match.
Kohli told Dhoni, "Sir it is not right as you got thrice the paintballs I have".

Dhoni instantly gives Kohli 10 hit paintballs.
Kohli replied, "Sir, I believe you still have twice the paintballs than I have".

Dhoni gives "?" more paintballs to Kohli.
Kohli replied, "Sir it is even now, Let us have a match".

What is "?".

What work can one never finish?