For the following questions answer them individually
In what time does a sum of money amount to twice of itself at simple interest of I 0% per annum?
Find the average of all the prime numbers between 1 to 50. [Give your answer correct to one decimal place.]
Select the number that will come in place of the question mark (?) in the following mathematical statement.
$$\frac{18}{292} \times \frac{73}{144} \times? = 19$$
A cylindrical rod of iron, whose height is equal to the radius of its base, is melted and cast into spherical balls, each of whose radius is half the radius of the base of the rod. Find the number of spherical balls thus made.
If $$P = 2^{8} \times 3^{5}, Q = 2^{5} \times 3^{4}$$ and $$R = 3^{5} \times 2^{7}$$, then what is the highest common factor of P, Q and R?
An article is sold at a discount of 12.5%, and still there is a profit of 15%. At what approximate percentage over and above its cost price has the mark-up price of the article been fixed?
Rajan sold an article to Shyam at a profit of 20%, Shyam sold it to Mohan at a loss of 10%, while Mohan sold it to Ratan at a profit of 12.5%. If Ratan purchased the article for ₹1,215, then at what price did Rajan purchase it?
The average of the runs scored by 8 players in an innings is 55. If the runs scored by 7 of these players in that innings are 25, 35, 45, 60, 65, 60 and 80, then how many runs are scored by the $$8^{th}$$ player in that innings?
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