Fast Multiplication by 5

This fast calculation trick or vedic maths trick will teach you how to multiply any number by 5. The concept can be divided in two parts as shown-

MULTIPLYING 5 TIMES AN EVEN NUMBER

Memory Trick: Halve the number you are multiplying by and place a zero after the number.

Example:

i. 5 × 136, half of 136 is 68, add a zero for an answer of 680.

ii. 5 × 874, half of 874 is 437; add a zero for an answer of 4370.

MULTIPLYING 5 TIMES AN ODD NUMBER: subtract one from the number you are multiplying, then halve that number and place a 5 after the resulting number.

Example:

343 x 5 = (343-1)/2 | 5 =  1715

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