fix issue rougier#92

Author: zhukpm

source/exercises100.ktx

@@ -423,17 +423,16 @@ np.negative(A,out=A)
 np.multiply(A,B,out=A)
 
 < q36
-Extract the integer part of a random array using 5 different methods (★★☆)
+Extract the integer part of a random array of positive numbers using 4 different methods (★★☆)
 
 < h36
-hint: %, np.floor, np.ceil, astype, np.trunc
+hint: %, np.floor, astype, np.trunc
 
 < a36
 Z = np.random.uniform(0,10,10)
 
 print (Z - Z%1)
 print (np.floor(Z))
-print (np.ceil(Z)-1)
 print (Z.astype(int))
 print (np.trunc(Z))