Maths MCQs 451 to 480 questions

451. What is the value of x in the equation 2x + 10 = 30?

Correct Answer: B Subtract 10 from 30 to get 20, then divide by 2. x = 10.

452. What is the square root of 144?

Correct Answer: C 12 multiplied by 12 equals 144.

453. Which of the following is a Prime Number?

Correct Answer: A 13 is only divisible by 1 and itself.

454. What is the area of a rectangle with length 8cm and width 5cm?

Correct Answer: B Area = Length × Width = 8 × 5 = 40.

455. What is the value of 5 to the power of 3 (5³)?

Correct Answer: C 5 × 5 × 5 = 125.

456. If a triangle has angles 60° and 40°, what is the third angle?

Correct Answer: B Sum of angles in a triangle is 180°. 180 - (60 + 40) = 80.

457. What is 15% of 200?

Correct Answer: B (15/100) × 200 = 30.

458. Solve for y: 3y = 27.

Correct Answer: A Divide 27 by 3 to get 9.

459. How many sides does a Heptagon have?

Correct Answer: C A heptagon is a polygon with 7 sides.

460. What is the value of Pi (π) approximated to two decimal places?

Correct Answer: B The mathematical constant π is roughly 3.14159...

461. If the diameter of a circle is 10cm, what is its radius?

Correct Answer: A Radius is half of the diameter. 10 / 2 = 5.

462. What is the result of 10 + 5 × 2?

Correct Answer: D According to BODMAS/PEMDAS, multiply first: 5 × 2 = 10, then 10 + 10 = 20.

463. What is the smallest whole number?

Correct Answer: B Whole numbers start from 0, 1, 2, ...

464. What is the LCM of 4 and 6?

Correct Answer: C The lowest common multiple of 4 (4, 8, 12) and 6 (6, 12) is 12.

465. How many degrees are in a right angle?

Correct Answer: B A right angle measures exactly 90 degrees.

466. Simplify: 2/5 + 1/5.

Correct Answer: A When denominators are same, add numerators: 2+1 = 3. Result 3/5.

467. What is the value of 10²?

Correct Answer: B 10 squared is 10 × 10 = 100.

468. If x - 5 = 12, what is x?

Correct Answer: C Add 5 to 12. x = 17.

469. How many minutes are there in 2.5 hours?

Correct Answer: B 2.5 × 60 minutes = 150 minutes.

470. What is the cube root of 27?

Correct Answer: C 3 × 3 × 3 = 27.

471. A polygon with 8 sides is called:

Correct Answer: B An octagon has 8 sides.

472. What is 7 + (-3)?

Correct Answer: A Adding a negative is like subtraction. 7 - 3 = 4.

473. What is the sum of interior angles of a square?

Correct Answer: C Each angle is 90°, so 4 × 90 = 360°.

474. What is the mode of this set: {2, 3, 3, 5, 7}?

Correct Answer: B Mode is the most frequent number. 3 appears twice.

475. Solve: 0.5 × 0.2.

Correct Answer: A 5 × 2 = 10. Move decimal two places back: 0.10 or 0.1.

476. What is the value of 0! (Zero Factorial)?

Correct Answer: B By mathematical definition, 0! = 1.

477. If a car travels 120km in 2 hours, what is its speed?

Correct Answer: B Speed = Distance / Time = 120 / 2 = 60 km/h.

478. Which is larger: 1/2 or 3/4?

Correct Answer: B 1/2 = 0.50, while 3/4 = 0.75.

479. How many years are in a Millennium?

Correct Answer: C A millennium is a period of 1000 years.

480. What is the next number in the series: 2, 4, 8, 16, ...?

Correct Answer: B The pattern is multiplying by 2. 16 × 2 = 32.

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