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Quantitative aptitude for Bank PO / Clerk Preparation – SURDS & INDICES

Quantitative aptitude for Bank PO / Clerk Preparation – SURDS & INDICES

Baking Online Classes : Surds & Indices is one of the important chapters from which you can expect questions in banking as well as SSC level exams. The concept of surds & indices is very easy but you have to practice as much as questions you can so that you can solve the problems in the exams easily.
Laws of Indices:
  • am x an = am + n
  • am / an = am-n
  • (am)n = amn
  • (ab)n = anbn
  • (a/b)n = an / bn
  • a0 = 1
Surds:
Let a be a rational number and n be a positive integer such that a(1/n) = , then
  • = a(1/n)
  • =
  • /b =
  • ()n= a
Ques: 1 (15)3.5x (15)?= 158
Sol: Let (15)3.5x (15)x= 158.
Then, (15)3.5 + x= 158.
So, 3.5 + x = 8
x= (8 – 3.5)
x= 4.5

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