Count the number of lines in the image below ?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Can you count the number of triangles in the given figure?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?