(9 votes, average: 3.89 out of 5)Distribute 1 to 99 in five groups so that total of each group comes same & what is that?
Hint: you don’t really have to do much calculation, just use your brain a little bit 🙂
This superb answer given by Amrit in comments
grp1- 1 to 9 and 90 to 99 => 1-9 twice and 10*90
grp2- 10 to 19 and 80 to 89 => 1-9 twice and 10*(10+80)
grp3- 20 to 29 and 70 to 79 => 1-9 twice and 10*(20+70)
grp4- 30 to 39 and 60 to 69 => 1-9 twice and 10*(30+60)
grp5- 40 to49 and 50 to 59 -> 1-9 twice and 10*(40+50)
grp1- 1 to 9 and 90 to 99 => 1-9 twice and 10*90
grp2- 10 to 19 and 80 to 89 => 1-9 twice and 10*(10+80)
grp3- 20 to 29 and 70 to 79 => 1-9 twice and 10*(20+70)
grp4- 30 to 39 and 60 to 69 => 1-9 twice and 10*(30+60)
grp5- 40 to49 and 50 to 59 -> 1-9 twice and 10*(40+50)
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grp1- 1 to 9 and 90 to 99
grp2- 10 to 19 and 80 to 89
grp3- 20 to 29 and 70 to 79
grp4- 30 to 39 and 60 to 69
grp5- 40 to59
A) 1,8,11,18,21,28,31,38,41,48,51,58,61,68,71,78,81,88,91,98=990
B) 2,7,12,17,22,27,32,37,42,47,52,57,62,67,72,77,82,87,92,97=990
C) 3,6,13,16,23,26,33,36,43,46,53,56,63,66,73,76,83,86,93,96=990
D) 4,5,14,15,24,25,34,35,44,45,54,55,64,65,74,75,84,85,94,95=990
E)
9,10,19,20,29,30,39,40,49,50,59,60,69,70,79,80,89,90,99=990