If the HCF of two numbers is 6 and the product of the numbers is 2520, find their LCM.
A dishonest dealer professes to sell his goods at cost price, but he uses a weight of 950 gm for a kilogram. His gain per cent is:
4 \( \frac{5}{19} \) %
5 \( \frac{5}{19} \) %
7 \( \frac{5}{19} \) %
6 \( \frac{5}{19} \) %
In the word LIBRARY, how many letters are there which occupy the same position when counted from the front as well as from the back?