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If 2n = 128 and y = 5, then 2n - 1 × 5n - 2y - 1 =?

1. A 100000
2. B 1000000
3. C 10000000
4. D None of these

By how much is the value of {-10 - (-7)} greater than the value of {-10 + (-7)}?

1. A -20
2. B 0
3. C 14
4. D 20

If x/y = -1 and xy = -1, then x - y =?

1. A -1
2. B -2
3. C 1
4. D 2

If x + y > 4 and x > 3, then y > 1 is true.

1. A always
2. B only if x < 0
3. C only if x = 0
4. D only if x > 0

If x2 + 4x + 13 = 1 + x2, then find out the value of x2?

1. A 0
2. B 4
3. C 7
4. D 9

If 1/x > 1/y, then which of the following must be true?

1. A x < 0
2. B x > y
3. C y < 0
4. D y > x

If two non-zero positive integers p and q are such that p = 4q and p < 8, then q =?

1. A 1
2. B 2
3. C 3
4. D 4

Tapo earns Tk.5.00 for every hour he works. Last week he worked for x hours. He purchased y kg of rice. Price of per kg rice is Tk.12.00. He saved the remaining amount. Which expression below ahows his savings?

1. A Tk.(5.00x + 12x + 12.00y)
2. B Tk.(5x - 12.00y)
3. C Tk.5.00(x - y)
4. D Tk.7.00(x - y)

If (x2 - 8x + 22) = 6, which of the following must be false?

1. A x = -4
2. B x = 4
3. C x > 0
4. D x > 3

If y = (3x - 6)/x, then for what values of x, y will be positive?

1. A -2 < x < 2
2. B x < 0
3. C x > 0
4. D x > 2 or x < 0