Latest NDA Aptitude Question SOLUTION: Which one among the following is a double salt ?
(A) K4[Fe(CN)6] (B) K2SO4Al2(SO4)324H2O
(C) CuSO4.5H2O (D) NaCl
If u consizder ur self as zero. ......
Don't worry u r d whole mathematics. ..
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The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?