1.

Find the units' digit in the expression 111.122.133.144.155.166 ?

Answer»

Units' digit in the given expression 

= Units’ digit of 11 × Units’ digit of 22 × Units’ digit of 33 × Units’ digit of 44 × Units’ digit of 55 × Units’ digit of 66 

= Units’ digit of (1 × 4 × 7 × 6 × 5 × 6) 

= Units' digit of 5040 = 0.



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