Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

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

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?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

What is the longest word in the dictionary?

Why is a river so rich ?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

You see me once in June, twice in November, and not at all in May. What am I?

If your uncle’s sister is not your aunt, what relation is she to you?

What is the fastest way to double your money?