253 X 11 = ?
The methodis very simple. The first and last digits of the answer will be the same as those of the number given and the procedure is as follows
253 X 11 = 2 |(2+5)|(5+3)|3 = 2 7 8 3
Ex. 3452 X 11 = (3)|(3 + 4)|(4 + 5)|(5 + 2)|(2) = 37972
Now try this
58697 X 11 =?
Ans. 5 |(5+8)|(8+6)|(6+9)|(9+7)| 7
= 5 | 13 | 14| 15 | 16 | 7 See carefully. Start from the right side as in addition and add the carry over number to the next left number.
= 5 | 13 | 14| 15+1 | 6 | 7
= 5 | 13 | 14+1| 6 | 6 | 7
= 5 | 13+1 | 5| 6 | 6 | 7
= 5+1 | 4 | 5| 6 | 6 | 7
= 6 4 5 6 6 7. That's the answer.
Ex. 371964 X 11 = 3 |(3+7)|(7+1)|(1+9)|(9+6)|(6+4)| 4
= 3 |(10)|(8)|(10)|(15)|(10)| 4
= 4 0 9 1 6 0 4
Try this to any number.
