If ‘Z’ stands for ‘÷’, ‘Q’ stands for ‘×’, ‘H’ stands for ‘+’ and ‘E’ stands for ‘–’, what will come in place of the question mark (?) in the following equation?
17 H 23 Q 42 Z 7 E 13 = ?

Given: 17 H 23 Q 42 Z 7 E 13 = ?
Logic: Replace the symbols with their respective arithmetic operations:
H = +
Q = ×
Z = ÷
E = –
The equation becomes: 17 + 23 × 42 ÷ 7 – 13
Following BODMAS:
17 + 23 × 42 ÷ 7 – 13

= 17 + 23 × 6 – 13

= 17 + 138 – 13

= 155 – 13

= 142
Final Answer: (c) 142 ​​