Mathematics MCQs

Capital-time products are 40,000 × 12 and 60,000 × 8.
Both equal 480,000, so the ratio is 1:1.

Convert 1/4 to 2/8.
Then 7/8 - 2/8 = 5/8.

Multiply both numbers by 10 to remove decimals.
Then 48 ÷ 6 = 8.

The original total age is 4 × 25 = 100 years.
The new total is 5 × 27 = 135, so the new age is 35.

Profit equals selling price minus cost price.
Thus, 920 - 800 = Rs. 120.

A's capital-time is 2 × 6 + 4 × 6 = 36 units.
B's is 3 × 12 = 36 units, so profits are equal.

Multiply numerators and denominators, then simplify.
(3 × 10)/(5 × 9) = 30/45 = 2/3.

The third decimal digit is 6, so the second decimal digit is rounded up.
Thus, 18.746 becomes 18.75.

The weighted sum is 70 × 2 + 90 × 3 = 410.
Dividing by the total weight 5 gives 82.

A 10% loss on Rs. 1,200 is Rs. 120.
Subtracting gives a selling price of Rs. 1,080.

A 20% profit gives a selling price of Rs. 960.
Since this is 80% of marked price, marked price = 960/0.8 = Rs. 1,200.

The positive factors of 16 are 1, 2, 4, 8, and 16.
Therefore, it has 5 positive factors.