Mathematics — All MCQs
1905 questions available
Q1561.3/1000 written as a decimal is?
Correct Answer: C
3 / 1000 = 0.003.
Q1562.If 25 students took the exam and 4 of them fails. What percent of them passed?
Correct Answer: C
Passed = 25 - 4 = 21. Pass percentage = (21 / 25) * 100 = 84%.
Q1563.An Urdu class has 12 boys and 18 girls. Boys are what fraction of the class?
Correct Answer: D
Total students = 12 + 18 = 30. Fraction of boys = 12 / 30 = 2/5.
Q1564.Ali ran around a 1/4 kilometer jogging track 17 times. How many kilometers did he run?
Correct Answer: B
Distance = 1/4 km * 17 = 17/4 km = 4 1/4 km.
Q1565.A man buys a toy for Rs. 70 after getting a discount of 20%. What was the marked price of the toy?
Correct Answer: C
Let marked price be x. After 20% discount, price is 80% of x: 0.8x = 70 => x = 70 / 0.8 = Rs. 87.50.
Q1566.Which number can replace both the question marks in 2/? = ?/50?
Correct Answer: B
Let the number be y. 2/y = y/50 => y^2 = 100 => y = 10.
Q1567.Decimal form of 5.3% is ______?
Correct Answer: A
5.3% = 5.3 / 100 = 0.053.
Q1568.If 2 : 7 :: x : 49, what is the value of 'x'?
Correct Answer: C
Product of extremes = Product of means: 2 * 49 = 7 * x => 98 = 7x => x = 14.
Q1569.The average of 5 quantities is 6. The average of 3 of them is 4. What is the average of the remaining 2 numbers?
Correct Answer: D
Sum of 5 quantities = 5 * 6 = 30. Sum of 3 quantities = 3 * 4 = 12. Sum of remaining 2 = 30 - 12 = 18. Average = 18 / 2 = 9.
Q1570.If the average of 5, 6, 7, and X is 10, what is the value of 'X'?
Correct Answer: B
Average of 4 values = 10 => Sum of 4 values = 4 * 10 = 40. 5 + 6 + 7 + X = 40 => 18 + X = 40 => X = 22.
Q1571.The arithmetic mean between 4 and 6 is?
Correct Answer: A
Arithmetic mean of a and b is (a + b)/2. Here, (4 + 6)/2 = 5.
Q1572.If x% of 60 = 48, then x = ?
Correct Answer: D
(x / 100) * 60 = 48 => 0.6x = 48 => x = 48 / 0.6 = 80.
Q1573.A bus with 32 data lines can transport how many bits at a time?
Correct Answer: C
Each data line carries 1 bit of data. Therefore, a 32-line bus carries 32 bits of data in parallel at a time.
Q1574.A square region has an area of 2304 sq. m. Find its perimeter?
Correct Answer: D
Side of square = sqrt(2304) = 48 m. Perimeter = 4 * side = 4 * 48 = 192 m.
Q1575.Solve: 840 + 14 + 40 = ?
Correct Answer: C
Sum = 840 + 14 + 40 = 894.
Q1576.A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 1. Find his average after the 17th inning?
Correct Answer: D
Let average after 17th inning be x. Average before was x - 1. Sum of 16 innings = 16(x - 1). 16(x - 1) + 87 = 17x => 16x - 16 + 87 = 17x => x = 71? Wait, let's recalculate: 16(x - 1) + 87 = 17x => 16x - 16 + 87 = 17x => x = 71. Wait, the source says 'average after 17th inning is 16(x - 3) + 87 = 17x => x = 39.' Ah! If the average increases by 3, but the question text says 'increases his average by 1' and then says x = 39. Wait, if average increases by 3, then 16(x - 3) + 87 = 17x => 17x - 16x = 87 - 48 = 39. So there is a typo in the question's text 'increases his average by 1' where it actually should be 3, or the answer 39 corresponds to the official key.
Q1577.When you divide 0.7 by 10 you will get?
Correct Answer: B
Dividing by 10 shifts the decimal point one position to the left: 0.7 / 10 = 0.07.
Q1578.The ratio of cost price and selling price is 4 : 5. The profit percent is?
Correct Answer: C
Profit = 5 - 4 = 1. Profit% = (Profit/CP) * 100 = (1/4) * 100 = 25%.
Q1579.By converting 142.5% into decimal, the answer will be?
Correct Answer: A
142.5% = 142.5 / 100 = 1.425.
Q1580.Solve 8 ÷ 0.2 = ?
Correct Answer: B
8 / 0.2 = 8 / (2/10) = 8 * 5 = 40.