Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

Find the smallest sentence with all the English alphabet.

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?