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Puzzle Plex

Today's Puzzle

Today was Catherine´s birthday. She turned 24. Catherine is twice as old as Ryan was when Catherine was as old as Ryan now. How old is Ryan now?..................


Surds and Indices

Practice Questions on Surds and Indice



Laws of Indices:


a m * a n = a (m+n)
a m /a n = a m-n
(a m ) n = a mn
(ab) n = a n * b n
(a/b) n = a n /b n
a0 = 1


Surds:


Let a be rational number and n be a positive integer such that a(1/n) = nth root of a (n(a)
Then, na is called a surd of order n.


Laws of Surds:


na = a 1/n
nab = na * nb
na/b =na / nb
(na) n = a
mth root of (nth root of a) = mna = (m*n)a
(na ) m = na m )