ASVAB Practice Math Questions

Category - Math - Hard

Which of the following is equal to x20 for all positive values of x?
  1. (x10 + x10 )
  2. (x2)10
  3. (x10)10
  4. (x5)15
Explanation
Answer B: It is raising exponents with same base. Here powers are multiplied (2X10 =20). (X2)10= X (2x10) = X20

Key takeaway: It is easy to simplify any exponent question if you remember following formulae:
am x an = am+n, am / an = am-n , (am ) n = am x n , (am ) 1/n = am/ n
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