Class X

1 + 1 + 1 = ? 1 + x(b - a) + x(c - a) 1 + x(a - b) + x(c - b) 1 + x(b - c) + x(a - c)
  1. 0
  2. 1
  3. xa - b - c
  4. . None of these
(25)7.5 x (5)2.5 ÷ (125)1.5 = 5?
  1. 8.5
  2. 13
  3. 16
  4. 17.5
The value of [(10)150 ÷ (10)146]
  1. 1000
  2. 10000
  3. 100000
  4. 106
Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:
  1. 1.45
  2. . 1.88
  3. 2.9
  4. 3.7
If m and n are whole numbers such that mn = 121, the value of (m - 1)n + 1 is:
  1. . 1
  2. 10
  3. 121
  4. 1000
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