Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

Which alphabet letter is a question?

You need to arrange three 7 and mathematical symbols to form number 1?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Can you make four (4) nines (9) equal 100?