Questions

India's first passenger train run took place from Mumbai to Thane for around 34 kms on 16th April in the year 1853. 

That train was hauled by three steam locomotives : Sahib, Sindh and Sultan.

That train had 14 carriages, carrying around 400 passengers.

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...

Second generation computers were developed during 1956 - 1963.

TAL Manufacturing Solutions, a wholly owned subsidiary of Tata Motors, on 11 April 2017 launched India’s first industrial-articulated robot and it goes by the name “BRABO”.

– BRABO is meant to complement the human workforce and perform repetitive, high volume, dangerous and time-consuming tasks from raw material handling to packaging of finished products.

– This is the first time that an industrial robot has been conceptualised, designed and manufactured in India. It is expected to increase productivity by 15-30%, with a payback period of 15 to 18 months.