test your aptitude

1. What is the average of 4, 7, 8 and 9?
To find the average add all the quantities 4 +7 + 8 + 9 = 28
and divide by the number of the quantities. 28 ÷ 4
There are four numbers. The total is
divided by the number of quantities. Answer: 7
2. What is the average time to complete a
journey if recorded times were 1 hour
50 minutes, 2 hours 10 minutes, 2 hours
40 minutes, 2 hours 15 minutes and 1 hour
5 minutes? Total hours = 10
Journeys = 5
Answer: 2 hours
3. If there are 8 boys in a class and 12
girls, what is the ratio of boys to girls?
A ratio compares one quantity with 8 to 12
another. It is common to reduce or 8 : 12
(simplify) ratios to the smallest possible or 2 : 3
whole numbers.
Answer: 2 : 3
4. What is the ratio of the following articles
to each other: 15 books, 25 newspapers 15 : 25 : 10
and 10 magazines? or 3 : 5 : 2
Answer: 3 : 5 : 2
5. What proportion of the number of
articles are newspapers?
Proportion is another word for ratio. It is
a part of the whole or total number. In
this case, the total is 3 + 5 + 2 = 10.
Newspapers are 5 parts out of 10. Answer: 1 : 2 (or ½)