Playing with Numbers Exercise 3.7 1). Find the HCF of the following numbers: 1). Renu purchases two bags of fertilizer of weights 75 kg and 69 kg. Find the maximum value of weight which can measure the weight of the fertilizer exact number of times. 2). Three boys step off together from the same […]
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Playing with Numbers Exercise 3.6 1). Find the HCF of the following numbers: a). 18, 48 b). 30, 42 c). 18, 60 d). 27, 63 e). 36, 84 f). 34, 102 g). 70, 105, 175 h) 91, 112, 49 i). 18, 54, 81 j). 12, 45, 75 Answer: a). 18, 48 Factors of 18
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Playing with Numbers Exercise 3.4 1). Find the common factors of : (a) 20 and 28 Factors of 20 = 1, 2, 4, 5, 10, 20 Factors of 28 = 1, 2, 4, 7, 14, 28 Common factors = 1, 2, 4 (b) 15 and 25 Factors of 15 = 1, 3, 5, 15 Factors
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Playing with Numbers Exercise 3.3 1). Using divisibility tests, determine which of the following numbers are divisible by 2; by 3; by 4; by 5; by 6; by 8; by 9; by 10 ; by 11 (say, yes or no): Number 2 3 4 5 6 8 9 10 11 128 990 1586
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Playing with Numbers Exercise 3.1 1). Write all the factors of the following numbers: a). 24 b). 15 c). 21 d). 27 e). 12 f). 20 g). 18 h). 23 i). 36 Answers: a). 24 24= 1 X 24 24 = 2 X 12 24 = 3 X 8 24 = 4
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Whole Numbers Exercise 2.3 1). Which of the following will not represent zero. a). 1+0 b). 0 X 0 c). 0/2 d). (10-10)/2 Answer: a. 2). If the product of two whole numbers is zero, can we say that one or both of them will be zero? Justify through examples. If the product of
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