PP-T2-DS-Q80

[aqboy[origen]]

80.

If x and y are positive integers such that x = 8y + 12, what is the greatest common divisor of x and y ?

(1) x = 12u, where u is an integer.

(2) y = 12z, where z is an integer.

ANS: B

請教一下這堤~~感謝[/code]

[sunnyblue13s]

Thinking Key: 求最大公因數...需要什麼??...就是數字組成因子....

請問這樣你能體會到爲什麼要選B了嗎??.....

(X Y 的最大公因數 = 4)