Maths Tricks

…By YuvaLakshya Team

All rights reserved

Multiply a number by 11 (eleven)

5 2 3 11-------- 3

Write unit digit as it is

5 2 3 11-------- 5 3

Add these two digits 2+3 = 5

Here carry is “0”

Step 1

Step 2

5 2 3 11--------- 7 5 3

Add these two digits

5+2=7

Here carry is “0”

Step 3

5 2 3 11---------5 7 5 3

Step 4

Add last carry to first digit.Note in this case last carry is 0

So 523 X 11 = 5753

Now take another number- 958

9 5 8 11 -------- 8

Write unit digit as it is

9 5 8 11 -------- 3 8

Add these two digits

Here carry is “1”

Step 1

Step 2

5 + 8 = 13

9 5 8 11 -------- 5 3 8

9 + 5

Here carry is “1”

Step 3

9 5 8 11 -----------1 0 5 3 8

Step 4

So 958 X 11 = 10538

1

Previous carry

15

9 + 1 = 10 (Add last carry to first digit.)