CBSE MATHEMATICS (IX-X)

  X th   MATHEMATICS ASSIGNMENT 100424_002 CH.01 REAL NUMBERS   (To prove given number as irrational) Click here to get  same document in pdf form 

  X th   MATHEMATICS ASSIGNMENT 100424_001 CH.01 REAL NUMBERS   (Applications of HCF and LCM) Q.1   Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together? (excluding the one at start)     [ ANS: LCM(2,4,6,8,10,12) = 120 sec= 2 min. ,    15 times] Q.2 The traffic lights at three different road crossings change after every 48 sec, 72 sec and 108 sec respectively. If they all change simultaneously at 8:20:00 hrs, when will they again change simultaneously ?                           [ ANS:  LCM=  432 seconds  =  7 min 12 sec .  Hence  answer is 08:27:12 hrs] Q.3 A merchant has 120 ltrs of and 180 ltrs of two kinds of oil. He wants the sell oil by filling the two kinds of oil in tins of equal volumes. What is the greatest of such a tin.   [ ANS: HCF =60 ltrs.] Q.4 Find the least number of soldiers in a regiment such that they stand in rows of 15, 20, 25 and form a p

Class 10 Maths Chapters MCQ When approaching multiple-choice questions in Mathematics, here are some tips to help you select the correct answer: 1. Understand the question : Read the question carefully and make sure you understand what is being asked. Pay attention to any specific instructions or conditions provided. 2. Show your work: For math problems, it can be helpful to show your work, especially for complex or multi-step problems. This can help you keep track of your calculations and identify any errors. 3. Check units and formatting: Pay attention to units of measurement, formatting requirements, and any other specific details that may be important in the question. Make sure your final answer is in the correct form. 4. Plug in values : If applicable, consider plugging in values to test different answer choices. This can help you eliminate incorrect options and narrow down your choices. 5. Use process of elimination : If you are unsure of the correct answer, try to eliminate choi