Archive | Math RSS for this section

Predict Number of Lions

A researcher is attempting to predict the number of lions in an African habitat based on previous data. He has formed a regression equation which is: Y = 25 + 0.5X – 2ZX, where X is the number of years since the first population sample, and Z is the death rate of the lions. If it has been 10 years, and the death rate is 1 lion per year, what is the predicted number of lions in the habitat?

Loading ... Loading ...

Subscribe below to receive the DAT Question of the Day delivered straight to your inbox every morning.

 



The Matrix

It takes 6 minutes and 12 minutes, respectively, to run two computer programs when they are run one at a time. However, their speeds are reduced by 50% and 40%, respectively, if running in parallel. If a PC starts running the two programs together, how long will it take for them to finish?

Loading ... Loading ...

Subscribe below to get the DAT Question of the Day delivered straight to your inbox every morning.

 



Car Journey

Mark’s car began a journey from a point at 7 AM, traveling at 30 mph. At 8 AM Jason’s car started traveling from the same point at 40 mph in the same direction as Jason. At what time will Jason pass Mark?

Loading ... Loading ...

Subscribe below to receive the DAT Question of the Day delivered straight to your inbox every morning.

 



Call It In The Air

What is the probability that a fair coin will show “heads” 2 out of 4 times?

Loading ... Loading ...

Subscribe below to get the DAT Question of the Day delivered straight to your inbox every morning.




Best of a Series

Two teams are playing a best-of-five series, which ends as soon as either team wins three games. If the two teams are equally likely to win a game, regardless of the outcomes of the others, what is the probability that the series ends after the first three games?

Loading ... Loading ...

Subscribe below to get the DAT Question of the Day delivered straight to your inbox every morning.




Median of Four Values

If the mean of 15, x, 17 and 12 is 15, what is the median of these four values?

Loading ... Loading ...

Subscribe below to get the DAT Question of the Day delivered straight to your inbox every morning.




Trigonometric Identities

Which of the following expressions can be simplified such that the result is equal to 1?

Loading ... Loading ...

Subscribe below to receive the DAT Question of the Day delivered straight to your inbox every morning.




Photo attributed to melburnian.

Adding Exponents

What is the value of 10-2 + 10-3 + 10-4?

Loading ... Loading ...

Subscribe below to get the DAT Question of the Day delivered straight to your inbox every morning.




Miles of Calculations

One-hundredth of a mile equals approximately how many meters?

Loading ... Loading ...

Subscribe below to get the DAT Question of the Day delivered straight to your inbox every morning.




Scientific Notation

2.4 x 10-6 x (5 x 106)2 = ?

Loading ... Loading ...

Subscribe below to get the DAT Question of the Day delivered straight to your inbox every morning.