Why are mental calculations involving digits 7 & 8 so difficult to do compared to other digits?
>>16918084India and underage
Bigger numbers harder, simple as
>>16918084>"table of 8">See rightmost digit (units place)>8, 6, 4, 2, 0, 8, 6, 4, 2, 0
I've always struggled with table of 7, not so much with 8
>>16918087But 9 is one of the easiest since the sum of the numbers always add up to 9 and the digits of the multiples of 9 have a very simple pattern where the first digit increases while the second decreases.
