Give me an x, I'll stand to face you. Give me a cross, I'll turn my back on you. What am I?

Question

What am I
A word of 6 letters,
I always play fair, Minus my first I am cold
Minus my last and jumbled, I'll give you a massage
Jumble my whole, You'll learn nothing from me
I always play fair

Note: Think out of box...

Answer 1

The number 9

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9x9=81
9+9=18