# Civil Service Exam Reviewer 2020 Page 22

167.) 12 : 72 : : 8 : ___?
a. 0
b. 32
c. 36
d. 38

168. PEMDAS: 10÷2×5−(12÷3×4)+1 =__?
a. 10
b. 1
c. −1
d. 23
e. None of the above

169. Sum of all odd numbers between 60 to 120.
a. 3775
b. 3050
c. 4000
d. 2700

170. John walks everyday from his house to the police station. After walking at a rate of 2 meters/second for 3 minutes, he looks at his watch and realizes that he has to run 4 meters/second for 1 minute so he won’t be late. What is the distance from his house to the police station?
a. 10 m
b. 60 m
c. 105 m
d. 400 m
e. 600 m

a. 0.5
b. 0.05
c. 0.005
d. 0.00005

172.) Number Series: 1/12, 1/6, 1/4, 1/3, ____
a. 1
b. 1/3
c. 5/12
d. ½
e. None of the above

173. A chemist has 400 millilitres of a solution of 20% alcohol on hand, and he wants to mix it with enough pure alcohol to turn it into a 30% alcohol solution. How much pure alcohol will this require?
a. 30
b. 40
c. 50
d. 60
e. 57

174. What is the percentage decrease from 80 to 60?
a. 33.33%
b. 25%
c. 20%
d. 75%
e. None of the above

175. What is the percentage increase from 60 to 80?
a. 33.33%
b. 25%
c. 20%
d. 75%
e. None of the above

176. A businessman sells 60% English books and still has 28 English books. Originally, he had:
a. 47
b. 39
c. 60
d. 70
e. None of the above

177. Twelve and one half percent of 200 is what number?
a. 112
b. 12
c. 50
d. 25
e. None of the above

178.) If the price of a book is first decreased by 25% and then increased by 20%, then the net change in the price will be :
a. 10%
b. 20%
c. 30%
d. 40%
e. None of the above

179. In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quantity of water to be further added is:
a. 20 L
b. 30 L
c. 40 L
d. 60 L
e. none of the above

180. Participants in a certain conference from Luzon, Visayas, and Mindanao are in the ratio of 4:3:2. If there are 120 participants from Luzon, how many participants are there in all?
a. 270
b. 150
c. 240
d. 420
e. None of the above

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