we have to form six digit numbers taking care of 1,9,0.Originally Posted bykansairacing

for the first digit we can use 7 numbers(2,3,4,5,6,7,8)

for the second digit we can use 8 numbers(0,2,3,4,5,6,7,8)

for the third digit we can use 8 numbers(0,2,3,4,5,6,7,8)

for the fourth digit we can use 8 numbers(0,2,3,4,5,6,7,8)

for the fifth digit we can use 8 numbers(0,2,3,4,5,6,7,8)

for the sixth digit we can use 8 numbers(0,2,3,4,5,6,7,8)

hence total possible numbers = 7*8*8*8*8*8