I have branches, but no fruit, trunk or leaves. What am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

I can write cow in 13 letters.

Can You?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

Solve the mathematical equation in the picture below.

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Look at the picture and find out which square is not linked with any of the other squares.

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?