What is full of holes but still holds water?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Make a sentence consisting of three words that have the whole alphabet.

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

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?