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

- Maths - When the numerator and denominator of a fraction are each increased by 5...
- math - the sum of numerator and denominator is 3 less than twice the denominator...
- MATH - the numerator of a fraction is one-half the denominator! If the numerator...
- math - The denominator of a fraction is 4 more than the numerator. If both the ...
- Math - The numerator of a fraction is two less than its denominator. When both ...
- Math - The denominator of a fraction is one more then the numerator. If 2 were ...
- math- plz hlp - The denominator of a fraction is greater than its numerator by 9...
- 8th grade math - The denominator of a fraction is 4 more than the numerator. If ...
- Math - The numerator of a simple fraction is 2 less than its denominator. The ...
- Math-Algebra - The numerator of a fraction is 3 less than the denominator. If 5 ...