10 Important Math MCQs for most of the competitive exams
Que 1: The least number to be added to 269 to make it a perfect square
(A) 31
(B) 16
(C) 7
(D) 20
Correct Ans: D
Que 2: Find the least number which when subtracted from 1850 makes it a perfect square
(A) 5
(B) 7
(C) 1
(D) 11
Correct Ans: C
Que 3: A train is moving at a speed of 132 km/h. If the length of the train is 110 m. How long will it take to cross a railway platform 165 m long?
(A) 6 s
(B) 7.5 s
(C) 8 s
(D) 6.5 s
Correct Ans: B
Que 4: The sum of the number of boys and girls in a school is 150. If the number of boys is x, then the number of girls becomes x% of the total number of students. How many boys are there in the school?
(A) 51
(B) 65
(C) 60
(D) 95
Correct Ans: C
Que 5: A scored 30% marks and failed by 15 marks. B scored 40% marks and obtained 35 marks more than those required to pass. What is the pass percentage?
(A) 33
(B) 40
(C) 34
(D) 38
Correct Ans: A
Que 6: 7 is added to a certain number, the sum is multiplied by 5, the product is divided by 9 and 3 is Subtracted from the quotient. The remainder left is 12. What is the number?
(A) 20
(B) 30
(C) 40
(D) 5
Correct Ans: A
Que 7: A towel was 50 cm broad and 100 cm long. When bleached, it was found to have lost 20% of its length and 10% of its breadth. Find the percentage of decrease in area?
(A) 32
(B) 28
(C) 33
(D) 24
Correct Ans: B
Que 8: 2.56 ×(13)² = ?
(A) 270.4
(B) 432.64
(C) 26.14
(D) None
Correct Ans: D
Que 9: 52 x 87 - 5000 = ?
(A) 4000
(B) 4124
(C) 3924
(D) 4024
Correct Ans: B
Que 10: If √x-9 = 4 . Find the value of x? (X-9 is under root)
(A) 25
(B) 5
(C) 16
(D) 75
Correct Ans: A
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