If the average (arithmetic mean) of 7 consecutive numbers is 16, what is the sum of the least and greatest of the 7 integers?
13
14
16
19
32
设7个数字中最小的数为x,根据题干中一直的数量关系可得, [x+ (x+1) + (x+2) + (x+3) + (x+4) + (x+5) + (x+6) ] /7=16,解得x=13,因此最小的数为13,最大的数为19,而13+19=32。