What is the least integer that is a sum of four different primes each greater than 20?  Options: A) 79 B) 83 C) 120 D) 133 E) 169
Given integer must be a sum of 4 primes each greater than 20. Thus each prime must be odd.   Therefore sum of Odd + Odd + Odd + Odd = Even   Only Even option is 120   Therefore Ans: 120   To verify   120 = 23 + 29 +31 +37
<result>C</result>
What is the least integer that is a sum of four different primes each greater than 20?