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?

I am an odd number. Take away a letter and I become even. What number am I?

Find the Goldfish below the given Image.

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

Can you find out the remainder when 3^300 is divided by 5?

Which letter of the alphabet has the most water?

By moving just one matchstick, you need to make the below statement true. Can you do it?

Can you solve the below rebus?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?