Can you fill the blank with the correct number?

6 30 870 756030 _____

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?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Which word does the below Plexor means ?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

There is something which is always coming but never arrives?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?