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Q.

If number of numbers greater than 3000, which can be formed by using the digits 0,1,2,3,4,5 without repetition, is n then n230is equal to 

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answer is 6.

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Detailed Solution

No. of 4 digit numbers= 3×5×4×3=180
No. of 5 digit numbers=  5×5×4×3×2=600
No. of 6 digit numbers=  5×5×4×3×2=600
n=1380⇒n230=6
 

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If number of numbers greater than 3000, which can be formed by using the digits 0,1,2,3,4,5 without repetition, is n then n230is equal to