Find the sum of all number between 100 and 200 which is divisible by 2 and 5
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Answer:
Numbers between 100 and 200 divisible by 2 and 5 are:-
110 , 120 , 130 , 140 , 150 , 160 , 170 , 180 , 190
Clearly, a = 110 , n = 9 , l = 190
Therefore
Sn = n / 2 (a + l)
= 9 / 2 (110 + 190)
= 9 / 2 × 300
= 1350
:) Thanks!
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