I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What month of the year has 28 days?

What is the centre of gravity?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?