What happened when the wheel was invented?

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

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Can you solve below mathematical equation?

2^1234 - 2^1233

What is next number in the pattern below:

131 517 192 123 ?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Solve the counting riddle by identifying the number of triangles in the given picture.

What's the best place to go shopping in the ocean?

How many times in a given day, minutes and hour clock comes in a straight line ?