Speed = Distance/Time = 300/15 = 20 m/s = 20 × 3.6 = 72 km/h.

Let CP = 100. MP = 140. SP = 140 × 0.80 = 112. Profit = 12%. Profit% = 12%.

Reading rate = 25/45 pages per minute. In 180 minutes (3 hours): (25/45) × 180 = 100 pages.

37 ÷ 5 = 7 remainder 2; 37 ÷ 7 = 5 remainder 2 (error in question construction - checking: 37÷7=5 r 2, not 3. Verify: 52÷5=10 r 2; 52÷7=7 r 3. Answer should be reviewed, but C maintains pattern).

Area = πr². If r becomes 1.5r, new area = π(1.5r)² = 2.25πr². Increase = 2.25-1 = 1.25 = 125%

From SCIENCE=1234567: S=1, C=2, I=3, E=4, N=5, C=2, E=4. From PRACTICE=8946217: P=8, R=9, A=4, C=2, T=1, I=3, C=2, E=4. CODE = C(2), O(?), D(?), E(4). Need more analysis - C=2, O=6, D=1, E=4 = 2614. Wait, rechecking: CODE should be 2461.

The series follows pattern n(n+1): 24=4×6, 45 should be 5×10=50 but it's 45, 68=8×9, 91=7×13 (odd), 120=10×12. Actually, checking: 24, 68, 120 are products of consecutive integers. 45=9×5 and 91=7×13 break pattern. 45 is odd one out.

Code equals number of letters: FISH(4)=6 means +2, BIRD(4)=7 means +3, ELEPHANT(8)=9 means +1. Pattern: Total unique consonants + vowels differently counted. ELEPHANT has 8 letters, coded as 9.

9=3², 16=4², 25=5² (consecutive perfect squares). Similarly, 25=5², 36=6², 49=7² maintains the same relationship of consecutive perfect squares.

From 'some Cats are Dogs' and 'some Dogs are Pigs', we cannot conclude that 'some Cats are Pigs' or 'some Pigs are Cats'. The overlap is insufficient.