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

Answer: seven

More Math Riddles with answers

More Math Riddles

I am as simple as a circle, worthless as a leader; but when I follow a group, their strength increases tenfold. By myself I'm practically nothing. What am I?
I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now?
I have 10 red socks and 10 blue socks in a drawer. How many socks must I take out to ensure that I have at least one matching pair? One how many to ensure I have at least a pair of red and a pair of blue?
I have five and take away two, yet I am left with four. How is this possible?
I’m not the sort that’s eaten, I’m not the sort you bake, Don’t put me in an oven; I don’t taste that great, But when applied correctly, around me you will find, Problems are so simple when my digits come to mind
If 1/2 of 5 is 3, then what is 1/3 of 10?
If 10 bags of jelly beans and 6 licorice sticks cost $1, and 10 licorice sticks and 6 jelly bean bags cost 92 cents. How much does one licorice stick cost?
If 3 cats can kill 3 rats in 3 minutes, how long will it take 100 cats to kill 100 rats?
If 3 salesmen can sell three cars in seven minutes, how many cars can six salesmen sell in seventy minutes?
If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?
If 6 doubloons are worth 1 1/2 ducats, how many ducats are 27 doubloons worth?
If half of 5 were 3, what would one-third of 10 be?