TS Police Constable Prelims 2022 · Question 37

Question 37 of the TSLPRB Police Constable Preliminary Written Test 2022 (28 August 2022). Try it first, then open the answer and explanation.

1. PC Prelims 2022 · Q37 · Arithmetic · Numbers & Simplification

   In the given four digit number 3x57 and in the number formed by writing the digits of the given number in reverse order, the difference of the place values of x is

   1. 1000
   2. 190
   3. 90
   4. 10

   ఇచ్చిన నాలుగు అంకెల సంఖ్య 3x57 లోనూ, ఇచ్చిన సంఖ్యలోని అంకెలను తిరగేసి వ్రాయగా వచ్చే సంఖ్యలోను x యొక్క స్థాన విలువల భేదం

   1. 1000
   2. 190
   3. 90
   4. 10
   Show answer

   Answer: (3) 90

   సమాధానం: (3) 90

   In 3x57 the digit x is in the hundreds place, and in the reversed number 75x3 it is in the tens place, so the places it occupies are worth 100 and 10 and their difference is 100 − 10 = 90. Strictly, the digit's place values are 100x and 10x, which differ by 90x, so 90 is the difference for each unit of x; the key takes 90.

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