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sir pls update daily current affairs

I need app for RBI Grade B

I want paper in hindi

test hindi me kyo nahi hota hai

vinay said " I clean teeth daily change on narration

suppose C1 C2 C3 C4 C5 5 companies the profits made by C1 C2 and C3 are in the ratio of 19 and 8 while the profit made by C2 C4 and C5 are in the ratio 18 1920 if she was made a profit of rupees 19 crores more than C1 then the total profit in Rupees made by all the five companies is

tan10°-tan50°+tan70°

TanX + Cot X = 5, what is the value.of tan2x + cot 2x

can u provide the study material for gs

best gk book for railway practice