TCS Company Numerical Ability Permutation and Combination

In which of the system, decimal number 184 is equal to 1234?

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TCS Other Question

A boy wnts tn mk cuboids of dimension 5m,6m,7m from small cubes of .03 m3. Latr he realized he cn mk same cuboids by making it hollow.wht is d no of the cubes to be removed?
a. 2000 b. 5000.
19.MR dash has 3 sons whose ages are respectively a,b,c. The grandfather has bought a cycle for the eldest son, mother has bought a bag for the youngest one which cost Rs150/. The sum of two age of the elder son & one son is 15.The difference of age of sons is 3 & 2.Then what is the age of the eldest son?
a)10, b)11, c) 12,d)13