Maths MCQs

Replace * by the smallest digit so that 723 *56* is divisible by 6. Optionsa) 1b) 2c) 3d) 4 Solution As per question723 *56*Divisible by 6 (2 x 3) divisible by both 2 and 3Divisible by 2 = Last digit is evenFrom options : Number may be 2 and 4Divisible by 3 = sum of […]

If the ratio of the areas of two similar triangles is 25 : 144, the ratio of their corresponding sides is: Optionsa) 12 : 5b) 5 : 12c) 25 : 12d) 5 : 144 Solution As per questionLet the two triangles be and It is given that ~ By the similarity criterion , if two

Hour Distance Travelled (in Km) X Distance Travelled (in Km) Y 1St 25 30 2nd 35 45 3rd 25 40 4th 20 30 5th 25 20 6th 20 15 Y’s average speed (km/hour) during the first five hours is: Optionsa) 31b) 34c) 32d) 33 Solution As per questionSum of first five hours speed = 30

Find the area of a square, one of whose diagonals is 4.8 m long. Optionsa) 12.5 m2b) 10.5 m2c) 9.5 m2d) 11.52 m2 Solution As per questionLet the one side of square is aDiagonals (d) = 4.8 mFormula : d = 4.8 = a = Area of square = a2Area of square = Area of

Simplify Optionsa) 2b) 3c) 5d) 1 Solution Let a = 4.2b = 1.2ab = 5.04Formula :a3 – b3 = (a-b) (a2 +ab + b2) = (a-b)(a-b) = (4.2 – 1.2) = 3 Ans: 3

Subject Marks Obtained Total Marks English 73 100 Hindi 56 80 Science 45 75 Mathematic 90 125 IT 45 60 In which subject did he score the highest marks (in %) ? Optionsa) Mathematicb) ITc) Englishd) Hindi Solution As per questionMarks in % = English marks in % = = 73%Hindi marks in % =

Find the average of the prime numbers lying between 50 and 76. Optionsa) 64b) 60c) 66d) 62 Solution As per questionThe prime numbers lying between 50 and 76 = 51 , 59 , 61 , 67 , 71 , 73The average of the prime numbers lying = 53+59+61+67+71+73/6 = 384/6 = 64 Ans: a) 64

The salary of a worker is first increased by 25%, then it is decreased by 12%. The percentage change in his salary is: Optionsa) 10% decreaseb) 10% increasec) 13% increased) 13% decrease Solution As per questionLet salary = 100After increased = 125decreased in 12% = = 15125 – 15 = 110Percentage change = 110 –

Which of the following numbers is divisible by both 2 and 5? Optionsa) 63840b) 20792c) 37915d) 37254 Solution As per questionDivisibility rule of 2 : last digits number is even No. , it means last digits is 0 , 2 , 4 , 6 , 8Such now as 638402079237254Divisibility rule of 5 : last digits

How many years will it take for Rs.8,400 to amount to Rs.11,928 at a simple interest rate of 7% per annum? Optionsa) 6b) 2c) 8d) 5 Solution As per questionP = 8400R = 7%T = ?S.I = Amount – principalS.I = 11928 – 8400S.I = 3528S.I = 3528 = 588T = 3528T = 3528 =