1.)If the mean of numbers 28, x, 42, 78 and 104 is 62, then what is the mean of 128, 255, 511, 1023 and x?
a. 395
b.275
c.355
d.415
e.365
2.) Braun invested a certain sum of money at 8% p.a. simple interest for 'n' years. At the end of 'n' years, Braun got back 4 times his original investment. What is the value of n?
Braun invested a certain sum of money at 8% p.a. simple interest for 'n' years. At the end of 'n' years, Braun got back 4 times his original investment. What is the value of n?
a.50 years
b.25 years
c.12 years 6 monts
d.37 years 6 months
e.40 years
3.)In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?
In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?
a.1:2
b.2:1
c.1:3
d.3:1
e.2:3
4.)For what values of 'k' will the pair of equations 3x + 4y = 12 and kx + 12y = 30 not have a unique solution?
For what values of 'k' will the pair of equations 3x + 4y = 12 and kx + 12y = 30 not have a unique solution?
a.12
b.9
c.3
d.7.5
e.2.5
5.)Sam buys 10 apples for $1. At what price should he sell a dozen apples if he wishes to make a profit of 25%?
a.$0.125
b.$1.25
c.$0.25
d.$1.5
e.$1.8
Answers to the above questions.
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