A shop sells a book for 240 rupees after giving a 20 % discount on the marked price. What is the marked price of the book?
If x + 1/x = 5, what is the value of x² + 1/x²?
The number of factors of 1800 that are multiple of 6 is …………. .
Arrange the following in decreasing order of number of molecules contained in:
(A) 16 g of \( O_2 \)
(B) 16 g of \( CO_2 \)
(C) 16 g of \( CO \)
(D) 16 g of \( H_2 \)