It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

What work can one never finish?

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?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

What is the largest number you can write with just 3 digits?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?