If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words?
Which of the following fractions has a decimal equivalent that is a terminating decimal?
A 10/189 B 15/196 C 16/225 D 25/144 E 39/128
For any integer k greater than 1, the symbol k* denotes the product of all the fractions of the form 1/t
, where t is an integer between 1 and k, inclusive.What is the value of 5*/4*?
A.5 B 5/4. C 4/5 D 1/4 E 1/5
What is the sum of a certain pair of consecutive odd integers?
(1)At least one of the integers is negative.
(2)At least one of the integers is positive.
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