Hello, I am doing the MGMAT study guide and the way the official guide describes how these 2 questions below are done are not consistent with methods taught by MGMAT. I was wondering if there was an easier way?
D13. If s and t are positive integers such that s/t = 64.12, which of the following could be a remainder when s is divided by t?
a. 2
b. 4
c. 8
d. 20
e. 45
D15. THe product of all the prime numbers less than 20 is closest to which of the following powers of 10?
a. 10^9
b. 10^8
c. 10^7
d. 10^6
e. 10^5
the official guide for this 2nd problem says to multiply 2,3,5,7,11,13,17 and 19. Surely we do not have that much time on the actual exam. Is there another way?
D13. If s and t are positive integers such that s/t = 64.12, which of the following could be a remainder when s is divided by t?
a. 2
b. 4
c. 8
d. 20
e. 45
D15. THe product of all the prime numbers less than 20 is closest to which of the following powers of 10?
a. 10^9
b. 10^8
c. 10^7
d. 10^6
e. 10^5
the official guide for this 2nd problem says to multiply 2,3,5,7,11,13,17 and 19. Surely we do not have that much time on the actual exam. Is there another way?
