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<html><body><h2 id="content-id-8273401659-2"><b>Number System Questions Overview</b></h2><p>Number System Questions have a good weightage in the Ssc Cgl Exam and the type of question asked in Ssc Cgl exam is similar to the question mentioned below. It has been solved and explained by KD Live Experts under the guidance of Neetu Mam and they have tried to elaborate the concept used in Number System Questions.</p><h2 id="content-id-8120765394-3"><b>Question On Number System </b></h2>Gopal has black pens and blue pens which together are 80 in number. If he had 10 more blue pens and 10 less black pens, the number of blue pens would have been 4 times the number of black pens. Find the original number of black pens with Gopal.
<div class="row show--dificulty--bar" style="margin-top:8px;"><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex !important;border-right:0.1px solid #eee;"><h3 style="font-size:12px !important;">Difficulty : Moderate </h3></div><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex;"><h3 style="font-size:12px !important;"> Average Time : 39 Seconds </h3></div></div><h2 id="content-id-5062839714-4"><b> Number System Questions Options</b></h2><ol><li><p>54</p>
</li><li><p>23</p>
</li><li><p>26</p>
</li><li><p>27</p>
</li><li><p>cannot be determined</p>
</li></ol> <h2 id="content-id-4091357268-5"><b> Number System Questions Solution</b></h2><p>The correct answer is <strong>Option 3 </strong>i.e. <strong>26</strong></p>

<p>Let Gopal have 'a' black pens and 'b' blue pens.</p>

<p>(a + b) = 80 and, (b + 10) = 4 × (a - 10)</p>

<p>⇒ b + 10 = 4a - 40</p>

<p>⇒ 4a - b = 50</p>

<p>therefore, 5a = 130</p>

<p>⇒ a = 26 and b = 54</p>
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The correct answer is Option 3 i.e. 26  - Number System Questions are asked in Ssc Cgl exams and your question has been explained by experts like Neetu Mam.

Gopal has black pens and - Number System Questions for Ssc Cgl

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