Christmas Card was invented by ________.
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In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
P_QR_QQ_PQ_R
What is the value of sec 5π/4?
Akbar (1556–1605 AD) was the ruler of which dynasty?
A can do a work in 15 days and B in 20 days. If they work on it together for 6 days, then what fraction of work is left?
In terms of size, Venus ranks no. ___ in our Solar System.
If cot 240° = x, then the value of x is