the sun of all 2- digit no.be divisible by 5 os
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Answer:
Step-by-step explanation:
Let get how many 2 digit number divisible by 5
10,15,20..... 95
D = 15-10= 20-15
= 5
Using :- s=n/2 [2a + (n-1)d]
N =18
S = 18/2 [2(10) + (17-1) 5 ]
= 18/2 [ 100]
= 18 . 50
= 945
tarun6719:
i am looking to the ans
on the place of( 17-1) there must be (18-1)
Just put 18 in place of 17 everywhere
Ans is 945
yes now it is right
i knoe
i solve it now
Okay have a nice day
same to you
thanks for this
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