Asked in Math and ArithmeticAlgebraFactoring and Multiples
Math and Arithmetic
Factoring and Multiples
How many factors does the number 22 have?
Asked in Factoring and Multiples
What are the factors and prime factors of 22?
Asked in Prime Numbers
How many rectangles can be built using thes prime number 22?
Asked in Math and Arithmetic, Algebra, Numbers
How many 3 digit numbers have even no of factors?
878 three digit numbers have an even number of factors. Every factor of a number has a pair, so there ought to be an even number of factors for every number. However, if a pair of the factors are the same number, then there will be an odd number of factors, that is if the number is a perfect square. Assuming three digit numbers are 100 to 999: From 100 to 999, the perfect squares are 102 = 100 to 312 = 961, a total of 31-10+1 = 22 numbers. So of the 999-100+1 = 900 three digit numbers, 22 have an odd number of factors, so 900-22 = 878 have an even number of factors.