CSS MCQs

Let the numbers be 5k and 8k; then (5k + 9)/(8k + 9) = 2/3.
Solving gives k = 9, so the smaller number is 45.

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.

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

The total score is 20 × 60 + 30 × 70 = 3,300.
Dividing by 50 students gives 66.

The decimal 0.375 equals 375/1000.
Dividing numerator and denominator by 125 gives 3/8.

One third of 3/4 is 1/4 of the full tank.
The remaining amount is 3/4 - 1/4 = 1/2.

Divide 7 by 20 or convert the denominator to 100.
Since 7/20 = 35/100, the decimal is 0.35.

One hundred fifty percent equals 1.5.
Multiplying 80 by 1.5 gives 120.

Twenty-five percent is one quarter.
One quarter of 240 is 240 ÷ 4 = 60.

Since 12.5% = 1/8, one eighth of the number is 25.
The whole number is 25 × 8 = 200.

The increase is 20 on an original value of 80.
The percentage increase is 20/80 × 100 = 25%.