What word does this rebus represent?

meta meta
meta meta

How can one talk without saying a single word?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

Which wheel of car does not rotate when you turn your car right?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Find the next number in the series.
1 10 24 43 67 ?

Which is the smallest number that you can write using all the vowels exactly once?

Find the number of squares in the below picture

Can you find out the missing number in the grid?