Aptitude Tests 4 Me

Basic Numeracy/Quantitative Aptitude

Detailed Solution

160. Assume Nadia will be 10 in 2 years. How old was she 3 years ago? If she will be 10 in 2 years, she is 8 now and 3 years ago was 5. Which of the choices equals 5 when x = 10, y = 2, and z = 3? Only x – y – z (C).

161. Let d = 1. Then c = 3 1/2, b = 7 1/2 , and a = 8. Which of the choices equals 1 when a = 8? Only (a-2)/6 (A).

162. If Anne drove at 60 miles per hour for 2 hours, how far did she go in the last 20 minutes? Since 20 minutes is 2/3 of an hour, she went 20 (1/3 of 60) miles.
Only r/3 (D) = 20 when r = 60 and h = 2.
Notice that h is irrelevant. Whether Anne had been driving for 2 hours or 20 hours, the distance she covered in her last 20 minutes would be the same.

163. The least common denominator of 3/4 and 1/4 is 20, so assume that there are 20 students at Central High. (Remember that the number you choose doesn’t have to be realistic.) Then the number of students taking Spanish is 12 (3/5 of 20) . Of the remaining 8 students, 2 (1/4 of 8) take Italian. The other 6 take French. Finally, 6 is 30% of 20.