I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Can you find out the total number of triangles in the given figure?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Decode the movie name from the below picture?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What's the best place to go shopping in the ocean?