Trick 28 - Mental Mathematics Multiply by 5, 25, 50, 500

Hello Friends....here is another amazing shortcut for multiplying numbers by 5, 25, 50, 500 etc.....very very useful for competitive exams....keep visiting the channel for more such videos....

[rahelsue]

Aggrawal saarey mathematician hotey kya

[ViejoFeo]

Augmenting perspective rather than rote techniques!

[vidyasagar]

sir could you explain 321*5 ..by your trick answer is 165... but actual answer is 1605