2 ["add" the next (first) digit] 2 * 10 20 [multiply by the base] 20 + 0 20 [add the next digit] 20 * 10 200 [multiply by the base] 200 + 4 204 [add the next digit] 204 * 10 2040 [multiply by the base] 2040+ 8 2048 [add the next digit]
??? to base 5:- 3 3* 5 15 [multiply by the base] 15+1 16 [add the next digit] 16* 5 80 [multiply by the base] 80+ 1 81 [add the next digit] 81* 5 405 [multiply by the base] 405+ 4 409 [add the next digit] 409*5 2045 2045+3 2048
since both the answers tally i.e. 2048 2048
hence the no. 31143 is the ans..
try solving with the answers(options given with the ques) given..
