Each letter is coded by its position in the alphabet. F=6, A=1, T=20, H=8, E=5, R=19

After going North and South equally, he returns to original latitude. Only 6 km East displacement remains.

Apple, Orange, and Banana are fruits. Potato is a vegetable.

All others are perfect squares (11², 12², 13², 14², 15²). 250 is not a perfect square.

The word is reversed. PAINT reversed = TNIAP. SMART reversed = TRAMS

Each number is multiplied by 2. 15×2=30, 30×2=60, 60×2=120, 120×2=240, 240×2=480

Alternate letters in the alphabet. A(1), C(3), E(5), G(7), I(9), K(11)

(45/180) × 100 = 25%

Profit = 100 - 80 = 20. Profit% = (20/80) × 100 = 25%

Each letter gets a unique number. M=1, O=3, T=4, H=5, E=8, R=9. B=2, so BROTHER = 2134589