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Real Numbers CBSE Grade X

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Published in: Mathematics
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Sample Pratice Notes Real Numbers Grade x CBSE Mathematics

Geetha A / Dubai

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  1. Geethaaravind Maths Site Grade10 Level I Find L.C.Mof 80, 72 and 120 using prime factorization Use Euclid's 2. Division Algorithm to find the HCF of 105 and 245. 3. The HCF of two numbers is 23 and their LCM is 1449. If one of the numbers is 161, find the other number. Explain why 3 x 5 x 7 4. + 7 is a composite number 5. Write whether the rational number 7/75 will have a terminating decimal expansion or a non- terminating repeating decimal expansion Answers 1. 720 2. 35 3. 207 5. non terminating Practice corner (Real Numbers) Level 2 l.Use Euclid's Division 1. Algorithm to find the HCF of 3444 and 410. 2. If HCF (a,b) and ax b = 1800, then find LCM (a,b) 3 Write whether the rational number 987/10500 will have a terminating decimal expansion or a non - terminating repeating decimal expansion 2. 3. 4. 4. Three bells toll at intervals of 9, 12 and 15 minutes respectively. If they start tolling together, 5. after what time will they next toll together? 5. Explain if 3 x 5 x 13 x 46 + 23 is a prime number or composite number Answers Level 3 If two positive integers a and b are written as a = x2y2 ; b = xy2 x,y are prime numbers, then find and LCM (a,b) What is the HCF of smallest prime number and the smallest composite number ? Find HCF and LCM of 404 and 96 and verify that HCF x LCM = Product of the two given numbers. Write the number f zeroes in the end of a number whose prime factorization is 22 x 5 x 32 Using Euclid's division algorithm, find the largest possible positive integer that divides 125, 162 and 259 leaving remainders 5, 6 and 7 respectively. 1 2. 3 4. 82 150 terminating 3 hours Answers 4.2 5. 12

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