In a certain code language, ‘sand is hot’ is written as ‘6 8 9’ and ‘grains are white sand’ is written as ‘4 3 9 2’. What is the code for ‘hot’ in that code language?

6 or 8

Given; In a certain code language, ‘sand is hot’ is written as ‘6 8 9’ and ‘grains are white sand’ is written as ‘4 3 9 2’.

sand  is  hot  =  6  8  9

grains  are  white  sand  =  4  3  9  2

So, for 'hot' only 6 or 8 is possible.