I am an odd number. Take away a letter and i become even. What number am i?

7 (Seven)

Step-by-step explanation:

Given information;

am an odd number;

Considering the first set of number 1,3,5,7,9 all spelt as one, three, five, seven, and nine respectively

The only odd number from the above list from which the word even can be formed from is 7 spelt as seven.

If the letter s is taken from seven, you are left with even. Hence the number is 7.

What number am i? 7 (Seven)

seven

take away s - > even