Some Math bytes !

Ever Wondered how easy it is to multiply 2, two digit numbers ending with the digit 5!

Ex:

**15*15 = 225**but how easily can you arrive at this answer? ever wondered it can be done in one step?

Read On..............................

Multiply both the 5's! you get 25 right? Now, multiply 1*1 and add 1 one to it = 2. So, the answer 225 :)

Similarly,

25*25 = Multiply both the 5's! Now again it gives you 25! Also, 2*2 =4 + 2 = 6. So, the answer 625 :)

and so on......................

So, try for other numbers and know the results yourself! Until next time chao!..................

Jay.

## 2 comments:

Alternatively ,

for 25* 25 the math can work as follows

5*5=25

take the first digit and add 1 to the first digit to get the second.Mulitply 1 and 2 to get the resultant.In this case

1st digit = 2

2nd digit= 2+1=3

Resultant =2*3 and concontenate 25= 625

Similar approach.........

What rr says is correct, but the first method doesn't work for larger numbers:

5*5 = 25

5*5 + 2 = 27

but 55*55 doesn't equal 2725.

rr's method

5(5+1) concat 5*5 gives 3025.

That works.

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