What are perfect numbers?
What is a perfect number and which number is the largest perfect number?
Why do perfect numbers end in either 6 or 28? What is the best lucky number? Who is perfect? What if your lucky number, is not your lucky number? What is the greatest 4 digit number divisible by each of the numbers 6, 9,15? Which is the largest 8 digit number having three different digits? Who is the perfect man? What would be the nearest multiple of 10 for the number 1075? Is anyone perfect? What is a perfect man? What is the most important number in the world? Which is the largest 4-digits number divisible by both 2 and 3? What is the 5 lucky numbers? How many odd numbers greater than 100 with distinct digits can be created using the digits 1,2,3,4,5,6? A = all positive integers less than 100. B = all multiples of three, C= all perfect square numbers. How many numbers are in A and B, but not C? Why is the number 7 considered as a lucky number? What is lucky number? What will be the largest number of 6 digits form by 2,3,0,4,9 and 8? How many 4 digit odd numbers can be formed using digits 0 to 9 such that if one of the digits of the number is 5, its next digit should be 6? Find the largest number of four digit which is exactly divisible by 27, 18,12, 15? What are the most important numbers in the world? What is a unique number? How many odd number greater than 100 with distinct can be created using the digits 1,2,3,4,5,6? What are some of the most intriguing 4 digit numbers? Is seven a lucky number? Is 7 a lucky number? How many combination of 6 numbers can you make in 49 numbers and there is 1 to 49? Maths: I write down three different positive whole numbers that add to 96. The sum of any two is divisible by the third. What is the largest number? For which positive integers "x", is 2 * x^2 is a perfect square? What is the greatest prime number?