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

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.