Question

when this 3 digit number is rounded to the beater hundred it rounds to 900 .the digit in the ones place is the fifth odd number you count beginning with one. the digit is 22.what is that number

Answer 1

859. 
Because it rounds to 900, it must be somewhere between 850-899. The fifth odd number you count beginning with 1 is 9 (1, 3, 5, 7, 9). That leaves 859, 869, 879, 889, and 899. Then use a calculator to add them up, and 859 is the only one that adds up to 22.