(1 + 3 + 5 + 7 + 9 + .....+ 99) is equal to
(1 + 3 + 5 + 7 + 9 + .....+ 99) is equal to
1). 2050
2). 2500
3). 2005
4). 2002
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# Answer for this question is 2500
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Answered by
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# 1 + 3 + 5 + ....... + 99
= (1+ 2 + 3 + 4 + ....... + 100)
– (2 + 4 + 6 ..... + 100)
= (1+ 2 + 3 + 4 + ....... + 100)
– 2(1 + 2 + 3 ..... + 50)
50 ×101 – 50 × 51
= 50 (101–51) = 50 × 50
= 2500
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