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

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

When is the top of a mountain similar to a savings account?

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?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Identify the next two numbers in this series.

101, 112, 131, 415, 161, 718, ???, ???

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I make two people out of one. What am I?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?