The "prime sum" of an integer n greater than 1 is the sum of all the prime factors of n, including repetitions. For example, the prime sum of 12 is 7, since 12=2x2x3 and 2+2+3=7. For which of the following integers is the prime sum greater than 35?
a 440
b 512
c 620
d 700
e 750
Is there any other faster way to solve this question except for doing every answer choice separately. This way luck is the only factor that decides the speed of solving the question. If I by chance pick the correct answer first great, but what if I pick the correct answer last - this could last longer.
Any suggestions? (I know that it is easy question and that everyone could solve it under 1 min., but since every second counts it's in everyone's best interest to create as large as possible surplus of time for harder questions).![]()
a 440
b 512
c 620
d 700
e 750
Is there any other faster way to solve this question except for doing every answer choice separately. This way luck is the only factor that decides the speed of solving the question. If I by chance pick the correct answer first great, but what if I pick the correct answer last - this could last longer.
Any suggestions? (I know that it is easy question and that everyone could solve it under 1 min., but since every second counts it's in everyone's best interest to create as large as possible surplus of time for harder questions).