If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

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

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

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 ?

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

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?