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Find the sum of all even numbers from 1 to 20?

Soln Date / Update:-

21-Jul-2025 07:41AM

Solution:-

Find the sum of all even numbers from 1 to 20?

(A) 123          (B) 156

(C) 110          (D) 132

Soln:-

Formula:- Sum of even number = n ( n + 2 ) / 4

= 20 ( 20 + 2 ) / 4

= 20 ( 22 ) / 4

= 5 * 55

= 110 Ans.

Ex-26

 

General & Competition Math (Vidyasagar) Ch-2: Examples-(2A)
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General & Competition Sub-Math (Vidyasagar)

General & Competition Math (Vidyasagar) Ch-2: Number System
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