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1 Find the odd one out:(a) 15(b) 21(c) 63(d) 81 the answer is 81 but explain it how​

Answer»

when ,U will add the UNITS of all numbers u will observe -

a)5+1=6

b)2+1=3

c)6+3=9

d)8+1=9

so ,the option C and D have the same and only answer offer their addition that's why last number is been GIVEN the CROWN of ODD man out



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