A shopkeeper sells two qualities of coffee at the rates of £55 per kg. and £48 per kg, gaining 10% and 20% profit respectively. If he mixes the two variants in the ratio 3:2 and sells the mixture at £36.8 per kg., what is his gain or loss?

Tap A can fill a tank in 28 hours, while tap B can fill the same tank in 21 hours. If both taps are open together, how long will it take to fill an empty tank?

Dexter picks a three digit number and subtract it from the same number after reversing order of its digits. If this difference is divided by 9, find the remainder.

A.

0

B.

2

C.

1

D.

Can not be determined without knowing exact number

In a clock if numbers 1 to 12 are replaced with alphabet starting from D, then which of the following position of hour-minute hand indicates 7 O'clock ?