In a class of 54 students, 24 drink milk, 28 drink tea and 8 drink none. Find how many drink both milk and tea?

Which one will replace the question mark ?

Mohan starts from point A and walks 1 km towards south, turns left and walks 1 km. Then turns left again and walks 1 km. Now which direction he is facing? 

In the following questions, select the term from the given options, which cannot be formed with the letter of the given word.
POWERMACHINE

Find the missing number?

IF 32 + 45 =3542, 47+72=4277, then Find out 86+12=?

In a string of 20 beads, the average weight of the first 14 beads is 25 grams and that of the last 6 beads is 8 grams. What is the average weight of all the beads?

In a row of boys, Srinath is 7th from the left and Venkat is 12th from the right. If they interchange their positions, Srinath becomes 22nd from the left. How many boys are there in the row?