1.  Which of the following will come in place of both the question marks in the following equation? 128/16*? - 7*2/7^2 - 8*6 + ?^2


3
14
16
17


Answer

 Option

Let 128/16*x - 7*2/7^2 - 8*6 + x^2 = 1. Then, 8x - 7*2 = 49 - 48 +x^2 <=> x^2 - 8x + 15 = 0 <=> (x - 3) (x-5) = 0 <=> x = 3 or x = 5.

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2.  What mathematical operation should come at the place of ? in the equation: 2 ? 6 - 12/ 4 + 2 =11.


+
-
*
/


Answer

 Option

Let 2*6 - 12/4/2 =11. then, 2*6 - 3 + 2 =11 <=> 2*6 = 11 + 3 -2 = 12. So, x must be replaced by 'x'.

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3.  Two - fifth of one - fourth of three - seventh of a number is 15. What is half of that number?


94
96
None of these
188


Answer

 Option

Let the number be x. Then, 2/5 of 1/4 of 3/7 of x = 15 <=> x = (15*7/3*4*5/2) = 350 <=> 1/2 x = 175.

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4.  The value of 25 - 5 {2 + 3 {2 - 2 (5 - 3) + 5} - 10}/ 4 is?


5
23.25
23.75
25


Answer

 Option

Given exp = 25 - 5 {2+3 { 2 - 2*2+5} - 10}/4 = 25 - 5 {2+3 {2-4+5} - 10}/4 = 25 - 5 {2+3*3* -10}/4 = 25 - 5 {2+9 - 10}/4 = 25 - 5/4 = 25 - 1.25 = 23.75.

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5.  The value of 1001/ 11 of 13 is?


7
91
143
169


Answer

 Option

Given expression =1001/143 = 7.

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