Question: 1500 is increased by 20%. Find the final number.
Options:
(A) 1500
(B) 1800.
(C) 1900
(D) 1700
(E) 1660
Answer: Final number = Initial number + 20%(original number) = 1500 + 20%(1500) = 1500 + 300 = 1800.
The answer is (B).

Question: An entrepreneurship competition requires registering teams to have 3 team members, at least one of which must be a technology co-founder. If all team members must come from the auditorium during the meet and greet event which has 4 technologists and 8 businessmen, how many possible team submissions are possible?
Options:
(A) 76
(B) 100
(C) 164
(D) 198
(E) 202
Answer: We have 3 scenarios here:
1) 1 tech2 businessmen: 4C1 x 8C2 = 112
2) 2 tech1 businessman: 4C2 x 8C1 = 48
3) 3 tech0 businessmen: 4C3 = 4
Total: 112+48+4 = 164
The answer is (C).

Question: How much is 25% of 40 is greater than 4/5 of 25?
Options:
(A) 10
(B) 776
(C) 66
(D) 12
(E) 99
Answer: (25/100) * 40 (4/5) * 25
10 - 20 = 10
The answer is (A).

Question: One copy machine can make 20 copies a minute, and a second copy machine makes 10 copies a minute. If the two copiers work together, how long would it take them to make 900 copies?
Options:
(A) 10 minutes
(B) 20 minutes
(C) 25 minutes
(D) 30 minutes
(E) 35 minutes
Answer:
Total work done by both machines in a minute = 20 + 10 = 30 copies
Total number of copies required = 900
Time = 900/30 = 30 mins
The answer is (D).