Mathematics MCQs

Multiply both terms by 2: \\( 3 \\times 2 : 4 \\times 2 = 6:8 \\).

Divide total cost by quantity: \\( \\frac{480}{240} = 2 \\).

Multiply the ratios: \\( \\frac{10}{8} \\times \\frac{5}{9} = \\frac{50}{72} = 25:36 \\).

Check cross-products: \\( 2 \\times 6 = 3 \\times 4 \\) (12=12).

Means are the middle terms: 10 and 25.

Product of extremes = means: \\( 12 \\times 6 = 3 \\times x \\). Solve for \\( x = 24 \\).

Direct proportion: \\( \\frac{140}{7} = \\frac{x}{12} \\). Solve for \\( x = 240 \\).

Convert weeks to days: 7 days : 14 days = 1:2.

Divide distance by fuel: \\( \\frac{220}{11} = 20 \\) km/l.

Inverse proportion: Increasing workers reduces time.