Find the sum of all odd numbers between 0 to 50 and 100 to 200
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1
Answer:
The sum of all odd numbers between 0-50 is 625
Answered by
1
Answer:
a + ( n - 1) d = an
=> 1 + ( n - 1) 2 = 49
=> ( n - 1) 2 = 48
=> ( n - 1) = 24
=> n = 25.
So,
Sn = n/2 × ( a +l)
= 25 /2× ( 1 +49)
= 25 /2 × 50
= 25 ×25
= 62
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