There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Solve the mathematical equation in the picture below.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

A time long back, there lived a king who ruled the great kingdom of Trojan House. As a part of the renovation of the kingdom to meet future security needs, he asked his chief architect to lay down a new play in a manner that all of his 10 castles are connected through five straight walls and each wall must connect four castles together. He also asked the architect that at least one of his castles should be protected with walls. The architect could not come up with any solution that served all of King's choices, but he suggested the best plan that you can see in the picture below. Can you find a better solution to serve the king's demand?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

How many Watermelons are there in the below picture?

What does this mean?

CCCCCCC

There is something which is always coming but never arrives?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?