RRB Technician Grade 3 previous year question
Two numbers have HCF 7 and LCM 84. If one number is 21, find the other.
Asked in RRB Technician Grade 3 (09 Mar 2026 Shift 1) · Quantitative Aptitude
Tap an option to check your answer.
Show answer and explanation
Correct answer: (C) 28
Product of two numbers = HCF × LCM = 7×84 = 588. If one number is 21, the other = 588/21 = 28.
हिंदी में प्रश्न
दो संख्याओं का महत्तम समापवर्तक (HCF) 7 और लघुत्तम समापवर्त्य (LCM) 84 है। यदि एक संख्या 21 है, तो दूसरी संख्या ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) 28
दो संख्याओं का गुणनफल = HCF × LCM = 7×84 = 588। यदि एक संख्या 21 है, तो दूसरी = 588/21 = 28.
More solved Quantitative Aptitude questions
- A customer purchases a laptop that has a marked price of ₹50,000. The store offers a 10% discount on the laptop. In addition, there is a…
- The area of a square is 225 cm². Its perimeter is equal to the perimeter of a regular hexagon. What is the area (in cm²) of the hexagon?
- Pipe A can fill a tank in 10 hours; pipe B can fill it in 12 hours, and pipe C can empty it in 15 hours. All three pipes are opened…
- Simplify: [(18 ÷ 9 × 3) of {((18 ÷ (6 × 2)) ÷ 3) + (16 ÷ (5 + 3 − 6))}]
- The capacity of a cylindrical tank is 55440 cm³. If its base radius is 14 cm, then find the total surface area of the tank. (Use π = 22/7)
- Kirti starts a business with ₹27,000 and after 7 months, Vaishnavi joins Kirti as her partner. After a year, the profit is divided in the…