Questions

Two series alternate here, with every third number following a different pattern.
In the main series, 4 is added to each number to arrive the next.
In alternate series, 5 is subtracted from each number t arrive the next number.
Here in the main series 
3 + 4 = 7
7 + 4 = 11
11 + 4 = 15
15 + 4 = 19

In alternate series 
24 - 5 = 19
19 - 5 = 14...

Grand Central Terminal also referred to as Grand Central Station or Grand Central is the world’s largest railway station in terms of platforms in New York City with 44 platforms covering 48 acres.

8-bit processor - 8085/Z80/6800;

16-bit processor - 8086/68000/Z8000;

32-bit processor - 80386/80486

The Communist Government of Yugoslavia had kept itself free from the Soviet Union almost from the beginning . Yugoslavia was one of the founders of the Non-Aligned Movement. It was a fedaration of 6 republics. In four of these republics, the rule of the communist parties came to an end in 1990. By 1992,Yugoslavia broke up into five independent states-the new states of yugoslavia comprising Serbia and Montenegro, Croatia, Macedonia, Slovenia and Bosnia-Herzegovina.