GRE Exam Numerical Ability Algebra

If bc≠0 and 3b+2c=18, then which of the following is NOT a possible value of c ? (A)9 (B)6 (C)8/5 (D)3/7 (E)5/8

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GRE Other Question

The integer m is a multiple of 154, 250 and 264. Which of the following is a factor of m ? (A) 294 (B) 1600 (C) 176 (D) 275 What is the difference between the number of 4 member committees that can be formed from a group of 8 members and the total number of ways there are to arrange the members of such a committee ? (A)1720 (B)1610 (C)1390 (D) 1680