1) 2a×3b= a) 5ab b) 6ab c) 10ab d) none of these 2) LCM of 4 and 6 is a) 24 b) 12 c) 6 d) 4 3) HCF of 3 and 4 is a) 3 b) 4 c) 0 d) 1 4) 40/(-2)= a) 20 b) -20 c) 10 d) -10

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