June 2026

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222

Last updated on June 29, 2026 by Gauravthummar

Question — of — — / — Practice Mode Exam Mode Correct : 0 Wrong : 0 Remaining : — …

Last updated on June 28, 2026 by Gauravthummar

$$sum_{i=0}^n i^2 = frac{(n^2+n)(2n+1)}{6}$$ Question — of — — / — The focal length of a concave lens is 0.5m. …