Prove that the below maths equation is true.

8 + 8 = 91

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

There are forty elephants and they have forty-fore heads. How can this be possible?

What number should come in place of the question mark below?

Joseph buys three kinds of chocolates for 100 rupees. The first one is priced at 5 rupees, second one at 3 rupees and third one at 0.5 rupees.

If he bought 100 chocolates in total, how many pieces do you think he bought each chocolate?

Replace the question mark in the picture below.

You need to arrange three 7 and mathematical symbols to form number 1?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?