Boojho was asked to find the LCM of 3, 5, 12 and another number. But while calculating, he wrote 21 instead of 12 and yet came with the correct answer. What could be the fourth number?
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The l.c.m of 3=3
the l.c.m of 5=5
the l.c.m of 12= 3×2×2
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A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. will the pencil appear to be bent to the same extent, if instead of water we use liquids like, kerosene or turpentine. support your answer with reason.
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