Question

how many 6-digit numbers are there in all

Answer 1

Hey mate here is your answer :

The first six digit no. is 100000

And the last 6 digit no. is 999999

So there are 900000 six digit numbers.

So the answer is 900000.

Hope it helps you :-)

Answer 2

Answer:

t1 = 100000

tn = 999999

tn = a + ( n- 1) d

999999 = 100000 + n- 1

999999 - 100000 = n- 1

899999 -1 = n

n = 899998

there are 899998 6 digit number