Examples 26 to 30 of Fundamental(Numbers)

Parin Sir > Quantitative Aptitude (Maths) > Fundamental (Numbers) > Examples 26 to 30 of Fundamental(Numbers)
18
Aug
Examples 26 to 30 of Fundamental(Numbers)

(26) Find the sum of  all odd numbers up to 100.

Soln. The given numbers are 1, 3, 5, 7, …, 99.

∴ T_n  =  2n – 1  ⇒  2n – 1  =  99

∴  n  =  50

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