A tank has two inlets : P and Q. P alone takes 6 hours and Q alone takes 8 hours to fill the empty tank completely when there is no leakage. A leakage was caused which would empty the full tank completely in ‘X’ hours when no inlet is opened. Now, when only inlet P was opened, it took 15 hours to fill the empty tank completely. How much time will Q alone take to fill the empty tank completely ? (in hours)

What is the difference between the total number of watches sold in both the towns together in June and the total number of watches sold in both the towns together in March

The number of watches sold in Town X in July was 10% more than the number of watches sold in the same Town in May. What is the respective ratio between the number of watches sold in July and those sold in January in the same town

The number of watches sold in Town Y increased by what percent from February to May

The number of watches sold in Town Y in April is what percent more than number of watches sold in Town X in the same month

What is the average number of watches sold in Town X in January, February, March and June