1. cate numere impare de forma 3b7a exista
2. aflati cel mai mare nr. natural de forma axy, unde x=2y
3. calculati suma tuturor numerelor xy stiind ca xy=4x+3y

2
b=0,1,2,3,4,5,6,7,8,9=10 numere, b=1,3,5,7,9=5 numere 5x10=50 numere
2) 984
2) 13+26+39=78

Răspunsuri

2014-04-04T16:51:11+03:00
3172, 3171, 3272, 3373, 3474, 3575, 3676, 3777, 3878, 3979
984.
34+68=102
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2014-04-04T16:59:01+03:00
1. 3071, 3073, 3075, 3077, 3079, 3171, 3173, 3175, 3177, 3179, 3271, 3273, 3275, 3277, 3279, 3371, 3373, 3375, 3377, 3379, 3471, 3473, 3475, 3477, 3479, 3571, 3573, 3575, 3577, 3579, 3671, 3673, 3675, 3677, 3679, 3771, 3773, 3775, 3777, 3779, 3871, 3873, 3875, 3877, 3879, 3971, 3973, 3975, 3977, 3979. Exista 30 de astfel de numere

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