Tiger is a specific type of Animal. Oak is a specific type of Tree

Total = Position from left + Position from right - 1 = 7 + 9 - 1 = 15. Wait, recalculating: If Anil is 7th from left and 9th from right, Total = 7 + 9 - 1 = 15. Actually 16 would mean 7 + 10 - 1. The answer is 15 people, but checking: left position + right position - 1 = 7 + 9 - 1 = 15. However, if 9th from right means 9 positions counting him, then total is 16.

Mohan's brother's son = Mohan's nephew. The mother of Mohan's nephew = Mohan's brother's wife = Mohan's sister-in-law.

Each letter shifts forward by 1 position in the alphabet: M→N, A→B, T→U, H→I, E→F, M→N, A→B, T→U, I→J, C→D, S→T. Applying same rule to COMPUTER: C→D, O→P, M→N, P→Q, U→V, T→U, E→F, R→S. So COMPUTER = DPNQVUFS.

Starting facing North: walks 10m North (position: 0,10), turns right (faces East), walks 15m East (position: 15,10), turns left (faces North), walks 5m North (position: 15,15). Final position is North-East from start.

ROAR is the sound a LION makes. Similarly, HISS is the sound a SNAKE makes. The relationship is animal to its characteristic sound.