Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Who always enjoys poor health?

When we see 2 but call 10?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

Find the missing number in the series below

13 -21 34 -55 ? -144

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Kareena is older than Bipasha. Bipasha is younger than Karishma and younger than Katrina. Katrina is older than Kareena and Alonso, who are older than Karishma.If Alonso and Kareena are twins, who's oldest?