Question: Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is_____________?

• 1. 1/2
• 2. 16/19
• 3. 4/5
• 4. 17/20

Question: If a number is chosen at random from the set {1, 2, 3, …., 100}, then the probability that the chosen number is a perfect cube is___________?

• 1. 1/25
• 2. 1/2
• 3. 4/13
• 4. 1/10

Question: A coin is tossed live times. What is the probability that there is at the least one tail?

• 1. 31/32
• 2. 1/16
• 3. 1/2
• 4. 1/32

Question: The probability that a number selected at random from the first 50 natural numbers is a composite number is__________?

• 1. 21/25
• 2. 17/25
• 3. 4/25
• 4. 8/25

Question: If Ahmed purchases a Watch for Rs 600 and pays 15% sales tax, the total amount spent on purchase is?

• 1. 660
• 2. 670
• 3. 680
• 4. 690

Question: Find two number whose sum is 28 and the difference is 4 _____________?

• 1. 12,16
• 2. 18,10
• 3. 15,13
• 4. 14,12

Question: If the number obtained on interchanging the digits of a two-digit number is 18 more than the original number and the sum of the digits is 8, then what is the original number ?

• 1. 26
• 2. 35
• 3. 53
• 4. Cannot be determined

Question: A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is :_________?

• 1. 18
• 2. 24
• 3. 42
• 4. 81

Question: Find the number which when multiplied by 15 is increased by 196.

• 1. 14
• 2. 20
• 3. 26
• 4. 28

Question: The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is :___________?

• 1. 20
• 2. 30
• 3. 40
• 4. None of these