81 x 9 = 801. What must you do to make the this equation true?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Can you replace the question mark with the correct number?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

I am white when I am dirty, and black when I am clean. What am I?