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