Why is 6 afraid of 7?

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 word does this rebus represent?

meta meta
meta meta

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

If eleven plus two equals one, what does nine plus five equal?

What has 13 hearts but no other organs?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?