Mathematics — All MCQs
1905 questions available
Q1.The value of the sum of the first 2 multiples of 5 is?
Correct Answer: B
Q2.x+y=16, x-y=3 than x2 -y2 =?
Correct Answer: D
Q3.In a class of 30 students average height is 150 cm one student added to class whose height is 155cm, then new average height is?
Correct Answer: A
Q4.2x1(2)+4x2(2)+6x3(2)..................20x10(2)?
Correct Answer: A
Q5.A wheel makes 500 revolution and covered 22 km distance, Find diameter of wheel?
Correct Answer: B
Q6.Find HCF of 48, 80, and 48p-80 Then P will be?
Correct Answer: A
Q7.If ( a, -a) then points lies on?
Correct Answer: A
Q8.There are 50 coins in total. some are 20-cent coins and some are 50-cent coins. Their total value is $20.70. How many 20 cent coins are there?
Correct Answer: B
Q9.Average of first 10 prime numbers is?
Correct Answer: B
The first 10 primes are 2,3,5,7,11,13,17,19,23,29, summing to 129; their average is 12.9.
Q10.0.003* 0.02 =
Correct Answer: C
0.003 × 0.02 = 0.00006.
Q11.The distance of foot of ladder to bottom of wall is 3m and height of wall is 4m. Find length of ladder?
Correct Answer: C
Using the Pythagorean theorem (3-4-5 triangle), the ladder length is 5 meters.
Q12.If in a class boys are 14 and girls are 18, find the ratio of girls to boys?
Correct Answer: B
The ratio of girls (18) to boys (14) simplifies to 9:7.
Q13.If X directly proportion with Y, Y = 5 if X = 2 If X is 7 find the Y?
Correct Answer: B
Since Y is directly proportional to X, Y/X is constant (5/2); for X=7, Y = 35/2.
Q14.Trees in forest diminish 6% every four year. trees in 2015 :14000. Than formula for number of trees? If P is number of trees after t years?
Correct Answer: B
With a 6% decrease every 4 years, the formula is P = 14000 × (0.94)^(t/4).
Q15.Which of the following is not a rational?
Correct Answer: B
√2 is an irrational number since it cannot be expressed as a simple fraction.
Q16.4x /5=3y/8, Find x: y
Correct Answer: B
Cross-multiplying 4x/5 = 3y/8 gives 32x = 15y, so x:y = 15:32.
Q17.~4x-3=4 find the x ?
Correct Answer: A
Solving the equation for x gives x = 19/4, as per the answer key.
Q18.Two trains are 300 km apart and are moving towards each other. one train is traveling at a speed of 90 km /h and the other at 60 km /h. after how much time will they meet?
Correct Answer: B
Combined speed is 150 km/h; time to meet = 300/150 = 2 hours.
Q19.A circular cone base radius is R and height is H. If we decrease radius of cone by 20% and increase height by 10%. How much volume will decrease?
Correct Answer: A
New volume factor = (0.8)² × 1.1 = 0.704, meaning the volume decreases by 29.6%.
Q20.0.003/0.02=?
Correct Answer: A
0.003 ÷ 0.02 = 0.15.