Maths Questions With Answers for Competitive Exams.

Maths questions with answers for competitive exams is about general knowledge questions of Mathematics for competitive exams. Here you can find out expected questions for competitive exams.

MATHS QUESTIONS WITH ANSWERS FOR COMPETITIVE EXAMS – Part 2

1. Which is greater: 2/3 or 4/5?
2. Write as decimals: 12/5.
3. Add: 0.05 + 1.357
4. Find the value of 0.1 + 0.11 + 0.111 + 0.1111
5. Find the value of: 5 x 5 – 5 + 5 x 5 + 5
6. The ratio between two numbers is 2:3. If their LCM is 60, find the smallest number?
7. What will be the rate of interest if the principal is Rs 2000 and simple interest for one year is Rs 180?
8. The average of 10 numbers is 30. If we add a number 30, then find the new average?
9. Age of A is twice the age of B. If their difference is 32, find the age of A?
10. Write as decimal: 50%.

ANSWERS WITH EXPLANATION:

1. 4/5
   [Explanation: 2/3 = 10/15 (multiply by 5 both in the numerator and denominator)
   4/5 = 12/15 (multiply by 3 both in the numerator and denominator)
   Since 12/15 > 10/15, 4/5 > 2/3.]
2. 2.4
   [Explanation: 12/5 = 24/10 (multiply by 2 both in the numerator and denominator)
   24/10 = 2.4]
3. 1.407
4. 0.4321
5. 50
   [Explanation: 5 x 5 – 5 + 5 x 5 + 5 = 25 – 5 + 25 + 5 = 50]
6. 20
   [Explanation: Let the numbers be 2x and 3x.
   LCM = 6x = 60 (given)
   x = 60/6 = 10
   Smallest number = 2x = 2 x 10 = 20]
7. 9%
   [Explanation: Simple Interest = PRT/100
   Given I = 180, P = 2000, T = 1 year
   180 = 2000 x R x 1/100 = 20 R
   R = 180/20 = 9%]
8. 30
   [Explanation: Sum of 10 numbers = 10 x 30 = 300
   Sum of 11 numbers = 300 + 30 = 330
   New average = 330 / 11 = 30]
9. 64
   [Explanation: Let age of B be x.
   Age of A = 2x
   Difference = 2x – x = 32
   x = 32
   Age of A = 2 X 32 = 64.
10. 5/10.
    [Explanation: 50% = 50/100 = 5/10]