percentage
2.  Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are:  
Answer: Option C Explanation:
Let their marks be (x + 9) and x.
25(x + 9) = 14(2x + 9) 3x = 99 x = 33 So, their marks are 42 and 33. 
3.  A fruit seller had some apples. He sells 40% apples and still has 420 apples. Originally, he had:  
Answer: Option D Explanation:
Suppose originally he had x apples. Then, (100 – 40)% of x = 420.

4.  What percentage of numbers from 1 to 70 have 1 or 9 in the unit’s digit?  
Answer: Option C Explanation:
Clearly, the numbers which have 1 or 9 in the unit’s digit, have squares that end in the digit 1. Such numbers from 1 to 70 are 1, 9, 11, 19, 21, 29, 31, 39, 41, 49, 51, 59, 61, 69. Number of such number =14

5.  If A = x% of y and B = y% of x, then which of the following is true?  
Answer: Option E Explanation:
A = B.
