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Solution


Q.

The LCM of smallest 2-digit number and smallest composite number is
1 12  
2 4  
3 20  
4 40  

Ans.

(3)

Smallest 2 digit number = 10 = 2 x 5

Smallest composite number = 4 = 22

∴ LCM (10, 4) = 22 x 5 = 20