Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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?

What do you see in the image below

The more it dries, the wetter it becomes. Can you tell what it is?

Count the number of triangles in the below picture?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

Buy me, smell me or deliver me, I do not change.

Who am I?

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

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?