Can you find out which number multiplied by itself will give the output as 12345678987654321?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Find the number of squares in the below-given picture.

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Find out the missing number in the picture attached:

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?