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

What Word am I Looking For ?

Prove that twice of ten is the same as twice of eleven.

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Whats the next number in the below number sequence pattern.

Find the number of squares in the below-given picture.

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?