Quants Tips

Quant Tips-1

To multiply any number by 5:

-> Half the number and multiply the result by 10.

For example: 245*5 = 1225

245*5

= (245/2)*10

=122.5*10

=1225

128*5

=(128/2)*10

=64*10

=640

Quant Tips-2

Squaring a number that ends with 5:

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65^2 =?

5*5 = 25

6*7 (next consecutive number)=42

65*65 = 4225

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55^2 = ?

5*5 = 25

5*6(next consecutive number) =30

55*55 = 3025

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Now try:35, 45, 75, 85, 95, 205, 505