Basic Mathematics

Reasoning Skills

Estimation

         

Which of the following is closest to

123,456,789×987,654,321? 123,456,789 \times 987,654,321 ?

(A)   1.0×1015\ \ 1.0 \times 10^{15}
(B)   1.0×1016\ \ 1.0 \times 10^{16}
(C)   1.0×1017\ \ 1.0 \times 10^{17}
(D)   1.0×1018\ \ 1.0 \times 10^{18}
(E)   1.0×1019\ \ 1.0 \times 10^{19}

If Kevin has 2525 quarters, 33 dimes, 55 nickels, and 22 pennies in his pocket, approximately how much money does he have?

(A)   $2.5\ \ \$2.5
(B)   $6.25\ \ \$6.25
(C)   $6.8\ \ \$6.8
(D)   $25.35\ \ \$25.35
(E)   $680\ \ \$680


NOTE: One quarter is $0.25,\$0.25, one dime is $0.1,\$0.1, one nickel is $0.05,\$0.05, and one penny is $0.01.\$0.01.

If Jane gets 9999% on her math test, Tom gets 8989% and James gets 7171%, what is their approximate average score?

(A)   77\ \ 77%
(B)   80\ \ 80%
(C)   86\ \ 86%
(D)   89\ \ 89%
(E)   94\ \ 94%

The above pie chart shows the number of men, women and children who attended a State Fair. What is the ratio of women to children?

(A)   9:4\ \ 9:4
(B)   4:9\ \ 4:9
(C)   3:2\ \ 3:2
(D)   2:3\ \ 2:3
(E)   1:1\ \ 1:1

What is the best approximation of 96+124?\sqrt{96}+\sqrt{124}?

(A)   19\ \ 19
(B)   20\ \ 20
(C)   21\ \ 21
(D)   22\ \ 22
(E)   23\ \ 23

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