Which tank will fill first?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

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

Can you name some countries which do not have the alphabet 'A' in them?

what does this picture(rebus) riddle means ?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

What Deficiency does the below rebus represent?

VIT_MIN

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

If six children and two dogs were under an umbrella, how come none of them got wet?