Question

[le thi lan huong]

tim so tu nhien b biet rang chia 326 cho b thi du 11 con chia 553 cho b thi du 13

Answer 1

[Khoimy Chanel]

ta co 326-11=315chia het cho b (b>11)

553-13=540chia het cho b(b>13)

=> b thuoc   uc (315,540)

315=3 mu 2 . 5 .7

540=2mu 2 .3.5

=>UCLN (315,540)=3m mu 2 .5 =45

vay b thuoc U(45)=(1,3,5,9,15,45)

vi b >13 =>b thuoc(15 , 45)

Answer 2

[My Love bost toán]

b\(\in\){15,45}