Q32:
Seven different numbers are selected from the integers 1 to 100, and each number is divided by 7. What is the sum of the remainders?
(1) The range of the seven remainders is 6.
(2) The seven numbers selected are consecutive integers.
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
answer: B
条件(2)虽然用1,2,3,4,5,6,7除7;和用8,9,10,11,12,13,14除7的尾数排列方法不太一样。但是他们的和是一致的,都是1+2+3+4+5+6+0。 所以第二个条件充分!
上边这句话不错,可是如果这两组数分别是1,2,3,4,5,6,7和2,3,4,5,6,7,8。显然两组余数的和是不同的。怀疑答案是E |