GRE-Math-Questions-to-Know-by-Test-Day-2nd-Edition_pag189

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147. 45 Let x = Morgan’s age now, and x + 5 = Morgan’s age 5 years from now. Write 
and solve the following equation, and then compute x + 5:
 − = +x x20 1
3
( 20) 
 − = ⋅ +x x3( 20) 3 1
3
( 20) 
 − = +x x3 60 20 
 =x2 80 
 =x 40 
 + =x 5 45 
 Tip: Be sure to answer the question asked. In this question, you must find Morgan’s age 
five years from now, not his current age.
148. 10 Let m = the number of non-employee guests at the party and − m25 = the number 
of employee guests. Write and solve the following equation:
− =m
m
25 3
2
 
 − =m m2(25 ) 3 
 − =m m50 2 3 
 = m50 5 
 =m 10 
149. 6 Let r = the jogger’s average jogging speed in miles per hour. Then r = 
t
8 miles , 
where t is the total time jogging (in hours). From the question information, 
t = 10:20 a.m. − 9:00 a.m. = 1 hour 20 minutes = 11
3
 hours = 4
3
 hours. Therefore, r = d
t
 = 
=8 miles
4
3
hours
6 miles per hour.
150. 63 Let x, y = 3x, and z = 5x be the three integers. Then their sum is + +x x x3 5 = x9 . 
Because − =z y 14, write and solve the following equation, and then compute 9x:
− =x x5 3 14 
 =x2 14 
 =x 7 
 =x9 63 
151. 7 Let p = the price of one papaya and m = the price of one mango. Then +p m2 is 
the price of one papaya and two mangoes. Tip: Notice that to answer the question, you do 
not need the specific values of p and m. You need only the value of the sum, +p m2 . From 
the information about Pierre’s purchase, + =m p10 5 $35, which simplifies to + =p m2 $7.
06_McCune_Answer.indd 180 2/21/22 4:46 PM