What is the longest word in the dictionary?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Complete the table series riddle by finding the number that can replace "??".

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

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

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?