I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

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 number should come in place of the question mark below?

How do you go from 98 to 720 using just one letter?

There was a strange boy who was born before his father. How can this be possible?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Can you count the number of quadrilaterals in the picture below?

When it's bad luck to meet a black cat?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?