10+10 and 11+11 can give you the same answer.

Explain how?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Identify the 10 differences between the two given pictures.

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

Find the missing number in the image below.

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Why is the Hole below a Lock?