Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What work can one never finish?

Can you replace the question mark with the correct number in the below table sequence?

How can you tell a raw egg from a hard-boiled egg?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

A man dies of old age on his 25 birthday. How is this possible?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?