Matching Pairs NumbersOnline version The following game is to identify people's attention and learning about numbers by CARLOS ALBERTO AVILES CASTANEDA 1 13 2 821 3 29 4 25 5 11 6 12 7 526 8 20 9 254 10 528 Five hundred and twenty - eight Two hundred and fifty four Twenty nine Five hundred and twenty - six Twelve Twenty Twenty five Thirteen Eleven Eight hundred and twenty - one