22 + 23 + 24 + ... 61 + 62 + 63 = ?	Choose the correct choice:  A) 1361  B) 1362  C) 1363  D) 1364  E) 1785
Sum = 22 + 23 + 24 + ... 61 + 62 + 63   Sum of n consecutive positive integers starting from 1 is given as n(n+1)/2   Sum of first 63 positive integers = 63*64/2   Sum of first 21 positive integers = 21*22/2   Sum = 22 + 23 + 24 + ... 61 + 62 + 63 = 63*64/2 - 21*22/2 = 1376   Answer : 1785
<result>E</result>
22 + 23 + 24 + ... 61 + 62 + 63 = ?