For all numbers s and t, the operation * is defined by S * T = (S - 1)(T + 1), if (-2)* x = -12 then x =

Muslim High School has 840 students, and the ratio of the number of students taking Spanish to the number not taking Spanish is 4:3. How many of the students take Spanish?

A. 280

B. 360

C. 480

D. 560

E. 630

Of the 200 seniors at Millat High School, exactly 40 are in the band. 60 are in the orchestra, and 10 are in both. How many students are in neither the band nor the orchestra?

A. 130

B. 110

C. 100

D. 140

E. 160

Consider the sequence 1, 2, 3, 1, 2, 3, 1, 2, 3,…….. What is the sum of the first 100 terms?

A. 100

B. 180

C. 198

D. 199

E. 200

If 2x - 1 = 9 then what is 10x - 5?

A. 35

B. 45

C. 55

D. 75

E. 95

A googol is the number that is written as 1 followed by 100 zeros. If g represents a googol, how many digits are there in g2.

A. 102

B. 103

C. 199

D. 201

E. 202