The average of the first 63 even natural numbers is:
प्रथम 63 सम प्राकृत संख्याओं (Natural number) का औसत (Average) ज्ञात कीजिए।
Answer और ExplanationAnswer and explanation
Answer: (A) 64
पहली 63 सम संख्याओं (Even number) का योग = 63 × (63 + 1)
औसत (Average) = 63(63+1)63 = 63 + 1 = 64
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औसत 64 है।
Sum of the first 63 even numbers = 63 × (63 + 1)
Average = 63(63+1)63 = 63 + 1 = 64
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The average is 64.
SMART APPROACH
पहली n सम संख्याओं (Even number) का औसत (Average) = n + 1 (2 और 2n का मध्य)।
Average of the first n even numbers = n + 1 (the middle of 2 and 2n).
Source: RRB NTPC (Graduate) · 22 Mar 2026 · Shift 3। Solution: Prashant Sir, Vijayastra।Source: RRB NTPC (Graduate) · 22 Mar 2026 · Shift 3. Solution by Prashant Sir, from Vijayastra.