For the following questions answer them individually
If $$\frac{1}{N}=\frac{(\sqrt{6}+\sqrt{5})}{\sqrt{6}-\sqrt{5}}$$, then what is the value of N ?
A boy added all natural numbers from 1 to 12, however he added one number twice due to which the sum becomes 80. What is the number which he
added twice?
Raman is 25% more efficient than Aman. If Aman can complete a piece of work in 25 days, then Raman can complete the same work in how many days?
A and B together can complete a work in 30 day. They started together but after 6 days A left the work and the work is completed by B after 36 more days. A alone can complete the entire work in how many days?
The marked price of an article is 40% more than its cost price. If 10% discount is given, then what is the profit percentage?
What will be the net discount (in percent) after giving three successive discounts of 10%, 20% and 30%?
The ratio of two numbers is 3 : 5. If both numbers are increased by 8, the ratio becomes 13 : 19. What is the sum of the two numbers?