What word begins and ends with an E, but has only one letter?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

What does this rebus mean?

O
N
C
E
TIME

What does below pictogram mean?

There is something which is always coming but never arrives?

Can you count the number of lines in the below picture?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What's a single-digit number with no value?