Plants which flower only once in their life

Answer the question given below on the basis of the given number and symbol series. 

(left) 2 5 # # $ 1 @ * 7 & % 4 & 5% 3 & 5 12 (right)

Select the number from the given options which will come in place of the question mark (?) in the following series. 

17, 38, 80, 143, 227, ?

If A means '×', B means '÷', C means '–' and D means '+', then find the value of the following. 

5 D 16 A 5 B 8 C 8

Work hard / lest you / may not fail.

Based on the following information, which of the following means that S is the maternal grandfather of T?  

From the given options, select the alphanumeric group which will come in place of the question mark (?) in the following series. 

Clothes : Wardrobe :: Car : ? 

Study the given pattern carefully and select the number that can replace the question mark (?) from the given alternatives. 

Select the number from the given options which will come in place of the question mark (?) in the following series. 

18, 23, 30, 39, 50, ?