यदि एक संख्या 810 × 97 × 78 के रूप में है, दी गयी संख्या के अभाज्य गुणनखण्डों की कुल संख्या ज्ञात कीजिये।

  1. 52
  2. 560
  3. 3360
  4. 25

Answer (Detailed Solution Below)

Option 1 : 52
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RRB NTPC Graduate Level Full Test - 01
100 Qs. 100 Marks 90 Mins

Detailed Solution

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दिया है:

दी गयी संख्या 810 × 97 × 78 है।

प्रयुक्त संकल्पना:

यदि एक संख्या xa × yb × zc ...... के रूप में है, तो कुल अभाज्य गुणनखंड = a + b + c ..... और इसी प्रकार आगे भी

जहाँ x, y, z, ... अभाज्य संख्याएँ हैं।

गणना:

संख्या 810 × 97 × 78 को (23)10 × (32)7 × 78 के रूप में भी लिखा जा सकता है।

संख्या को 230 × 314 × 78 लिखा जा सकता है।

अभाज्य गुणनखण्डों की कुल संख्या = 30 + 14 + 8

∴ अभाज्य गुणनखण्डों की कुल संख्या 52 है।

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