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Maths Puzzle
How many 4-dogits numbers are there whose decimal notation contains not more than two different disticnt dogits..?
option
a) 672
b) 576
c) 360
d) 448
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if 30x+31y+29z=366
find x+y+z?
some n consecutive numbers are written and unfortunately one number is erased and the remaining numbers average is 50and1/3 what is the number erased?
