Being a prime number, 23 has just two factors, 1 and 23. The pair factors of the number 23 are integers but not any fraction or a decimal number. Also, both the digits, 2 and 3, are prime.
What is a greatest number?
To get the greatest number, the greatest digit 9 is placed at the highest valued place, i.e., thousands-place, next smaller digit 6 at hundreds-place, still smaller digit 5 at ten’s place and the smallest digit 2 at one’s or units place. Thus, the greatest number is 9652.
What is the largest 3 digit number with unique digits?
The condition for 3 digit number of three different digits is that 6 is at the ones place. The greatest 3 digit number will be 986 and the smallest 3 digit number will be 106.
What is the biggest odd number?
Approach: Largest N-digit even number will be (10n) – 2 because the series for different values of N will be 8, 98, 998, 9998, ….. Similarly, largest N-digit odd number will be (10n) – 1 for the series 9, 99, 999, 9999, …..
What are the properties of numbers that have three factors?
What are the properties of numbers that have as factors one, itself, and one other number? As it turns out, the only positive integers with exactly three factors are the squares of primes. For instance, the factors of 9 are 1, 3, and 9, and the factors of 49 are 1, 7, and 49.
How to check if a number has exactly three distinct factors?
If the square root of given number (say x 2) is prime (after conforming that number is perfect square) then it must have exactly three distinct factors i.e., A number 1 of course. Square root of a number i.e., x (prime number). Number itself i.e., x2.
How many numbers from 1 to 100 have exactly 3 factors?
The factors must be prime, since any non-prime factor would itself have factors, meaning we’d exclude for example 2 x 3 x 4 = 24 since 4 is 2 x 2, so 24 really has 4 factors. Prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23 – anything over this cannot result in a combined result of 100 or less (since 2 x 2 x n = 100 gives n = 25).
What are two numbers less than 50 that have exactly 3 factors?
You should have probably mentioned “2 digit numbers less than 50 that have exactly 3 factors”, because this is the property of a square number of a prime and there are 4 squares below 50 that are the squares of prime numbers. There are 4 numbers as shown below and two of them are 2 digit numbers and the remaining 2 numbers are single digit numbers.
