I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

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

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

What demands an answer, but asks no questions

Find the next number in the following series:
6, 14, 26, 98, __?

Which is heavier: a ton of bricks or a ton of feathers?