How many zeros are there in a trillion in India?

Answer 1

As far as I can work out, India does not use either the long or short scales but their own system of numbers (with names based on odd powers of 10, so names for 10 x 1012 and 10 x 1018 exist).

With India being a former part of the British Empire, they can use the [pre-1974] British use of the long scale where a trillion has 18 zeros.

However, in [international] commerce, they may interpret it on the short scale with 12 zeros.