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How many 4digit numbers r there between 999 &3000 

How many 4digit numbers r there between 99 and 3000 

Asked by preetm2505 4th April 2019, 12:20 AM
Answered by Expert
Answer:
 
4 digit numbers between 999 and 3000 are 
 
1000, 1001, 1002, .... , 2999
 
Here a = 1000, d = 1001 - 1000 = 1 and an = 2999 
We know that,
 
an = a + (n - 1)d 
→ 2999 = 1000 + (n - 1)1
→ 1999 = n - 1
→ n = 2000
Therefore 4 digit numbers between 999 and 3000  are 2000.
Answered by Expert 4th April 2019, 9:15 AM
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