Question : A boy added all natural numbers from 1 to 12, but he added one number twice, due to which the sum became 80. What is the number that he added twice?

Option 1: 3

Option 2: 2

Option 3: 7

Option 4: 8

Question : The average of some natural numbers is 15. If 30 is added to the first number and 5 is subtracted from the last number, the new average becomes 17.5. What is the total number of natural numbers?

Option 1: 15

Option 2: 30

Option 3: 20

Option 4: 10

Question : Arrange the given ratios in descending order
15 : 7, 5 : 11, and 21 : 77.

Option 1: 21 : 77 > 5 : 11 > 15 : 7

Option 2: 15 : 7 > 5 : 11 > 21 : 77

Option 3: 15 : 7 > 21 : 77 > 5 : 11

Option 4: 5 : 11 > 15 : 7 > 21 : 77

Question : If the sum of two numbers is 60 and their HCF and LCM are 5 and 60, respectively, then the sum of the reciprocals of the numbers will be:

Option 1: $\frac{1}{11}$

Option 2: $\frac{1}{6}$

Option 3: $\frac{1}{4}$

Option 4: $\frac{1}{5}$

Question : Directions: When a number is added to its next number and another number that is four times its next number, the sum of these three numbers is 95. Find the number.

Option 1: 16

Option 2: 14

Option 3: 17

Option 4: 15