1.

Find the cubes of 10, 30, 100, 1000. What can you say about the zeros at the end?

Answer»

103= 10 x 10 x 10 = 1.000 (3 zeros) 

303 = 30 × 30 × 30 = 27000 (3 zeros) 

1003 = 100 × 100 × 100 = 1000000 (6 zeros) 

10003 = 1000 × 1000 × 1000 = 1000000000 (9 zeros) 

The number of zeros at the end are always multiple of 3



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