How many 3 digital numbers are divisible by 3
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By Arithmetic progression:
an=a1+(n−1)dan=a1+(n−1)d
999=102+(n−1)(3)999=102+(n−1)(3)
n=300
Required =900−nRequired =900−n
Required =600Required =600 answer
an=a1+(n−1)dan=a1+(n−1)d
999=102+(n−1)(3)999=102+(n−1)(3)
n=300
Required =900−nRequired =900−n
Required =600Required =600 answer
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