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How many two digit numbers are divisible by 3
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Answer:
30
Step-by-step explanation:
How many two digit numbers are divisible by 3?
Join Amity Pune’s BBA/MBA program.
Two digit numbers which are divisible by 3 are :-
12 , 15 , 18 , 21 ,………………….., 99.
This is an A.P in which a=12 , d=15–12=3. tn = 99. and n=?.
tn= a+ (n-1).d.
99=12+(n-1).3
87/3 = (n-1)
29 = n-1
or. n=29+1 = 30. Answer.
It should be an ap whose first term is 12and last term is 99
12,15,18,21- - - - - - -99
a=12
l=99
n=?
d=3
l=a+(n-1)d
99=12+(n-1)3
87/3=n-1
29=n-1
n=30
Hope,your doubt can be solved
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