Math tricks
February 10, 2018
Do you believe you don’t have to punch all calculations on a calculator to get your answers? Why don’t you move on with your own mini-calculator in your brain.
lets take a look at multiples of nine.
First list all single digits vertically in ascending order . Then list all single digits again in descending order. You will notice that you basically formed the multiples of nine from 1-10.
0 9
1 8
2 7
3 6
4 5
5 4
6 3
7 2
8 1
9 0
When the second column is 0 the next number should repeat the first column on the previous number then add nine for the second column. after these, repeat the cycle.
9 9
10 8
11 7
12 6
13 5
14 4
15 3
16 2
17 1
18 0
18 9
19 8
keep on repeating the cycle and you will end up listing all the multiples of nine.