The average of 7 consecutive number is 20. The largest of these numbers is :
A
20
B
22
C
23
D
24
Correct Answer: 23
Hints: The average of seven consecutive number is - a + a + 1 + a + 2 + a + 3 + a + 4 + a + 5 + a + 6/7 = 20 7a + 21 = 20 × 7 7a = 140 - 21 a = 119/7 = 17 Target = 17 + 6 = 23 (ans)