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Numerical ability with answers - Simplify the following

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Simplify:

(i) 7777 + 777 + 77 + 7

7777

777

77

7

Ans: 8638

 

ii) 23456 - 8245 - 746

= 23456 – (8245 + 746)

= 23456 - 8991

Ans: 14465

 

iii) 8475632x9999

=8475632 (10000-1)

= 84756320000-8475632

Ans: 8.474784437x1010

 

iv) 584732x 625

= 584732 x 54

= 5847320000/16

Ans: 365457500

 

v) 3608 x 3608

= (3608)2

= (3600 + 8)2

= (3600)2 + (8)2 + 2 x 3600 x 8

= 12960000 + 64 + 57600

Ans: 13017664

 

vi) 5898 x 5898

=(5898)2

= (5900 - 2)2

= (5900)2 + (2)2 - 2 x 5900 x 2

=34810000 + 4 - 23600

Ans: 34786404

Contributor: Pallavi

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