how many 2 digits number are divisible by 3
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Answered by
1
a=12. d=3. A(n)=99
Using formula
A(n)=a+(n-1) d
99=12(n-1) 3
99-12=(n-1) 3
87=(n-1) 3
n-1=87/3
n-1=29
n=29+1 =30
30 numbers of 2 digits are divisible by 3
Using formula
A(n)=a+(n-1) d
99=12(n-1) 3
99-12=(n-1) 3
87=(n-1) 3
n-1=87/3
n-1=29
n=29+1 =30
30 numbers of 2 digits are divisible by 3
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2
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