Homework Help: math

Posted by 5 grade on Tuesday, November 29, 2011 at 3:15pm.

this is a math riddle that i can't do so please help i am a fraction eguivalent to 2/4 the sum of my numerator and my denominator is 21 what fraction am i
here it is help me please's

math - Steve, Tuesday, November 29, 2011 at 3:50pm
Since the sum is odd, either the numerator or denominator is odd.

Since the fraction is 1/2, the denominator is even. So, we want a faction with odd numerator, even denominator, where they add to 21 and denominator is twice the numerator.

1/2? no
3/6? no
5/10? no
7/14 <<<---

or, since the denominator is twice the numerator, that means 3 times the numerator is 21. So, 7/14.

Answer this Question

Related Questions

math - trying to find a fraction riddle. I'm a fraction greater than 1/2 and...
math - Will someone please show me how to do this problem. I have to write this ...
math - write a definition for an equivalent fraction. A. a fraction of ...
Math - WHAT 3,000 MULTIPLY BY 583? PLEASE SOLVE MY RIDDLE! IT IS MIDDLE OF THE ...
Health - When people make Grilled Chicken do they take the skin out from the ...
Math - The denominator of a fraction exceeds twice the numerator of the fraction...
TO TEACHERS AND WRITEACHER - TO TEACHERS AND WRITEACHER HELLO, I AM NEW TO THIS ...
riddle - could anyone please solve this riddle : I am what you cannot be but ...
math - Please help my equivalent fraction. I am greater than 1/5 and less than 1...
algebra with pizazz pg 40 riddle - what is the riddle answer??? missed lesson ...

For Further Reading

First Name:
School Subject:
Answer: