2012 II QUESTIONS AND ANSWERS :: part8 : 6 to 10
Following Multiple choice objective type questions and answers will help you as a free online coaching for your TRB SSC CGL written exam preparation for 2017. These are useful study materials collected from previous year question papers. :
6.If x=√5-2 / √5+2,then x⁴+x⁻⁴is |
| a surd |
| a rational number but not an integer |
| an integer |
| an irrational number but not a surd |
7.If 3-5x/x + 3-5y/y+ 3-5z/z =0,the value of 1/x,1/y,1/z is |
| -5 |
| 5 |
| 2 |
| 3 |
8.The value of (√5+√3)(3√3 / √5+√2 - √5 / √3+√2) is |
| 2√2 |
| 2-√2 |
| √2 |
| 2 |
9.If x=27 and ³√x+³√y=³√729,then y=? |
| 64 |
| 125 |
| 216 |
| 81 |
10.The value of sin 39° / cos 51° + 2 tan 11° tan 31° tan 45° tan 59° tan 79° -3 (sin 21°+sin 69°) is |
| 1 |
| 2 |
| -1 |
| 0 |
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