Statements: All boys are students. Some students are intelligent. All intelligent are hardworking. Some hardworking are successful. Conclusion: Some boys are successful. Is this valid?

If 5#3 = 34, 7#4 = 65, 2#6 = 40, then 8#5 = ?

PLANT is written as SODUQ. How is TREND written?

If BROTHER is coded as 24, then SISTER is coded as:

Find the next term: 3, 7, 15, 31, 63, ?

In a code, P plus Q means P is brother of Q, P minus Q means P is sister of Q, P times Q means P is father of Q. What does P plus Q minus R mean?