Question : The mass number of potassium is:

Option 1: 39

Option 2: 40

Option 3: 38

Option 4: 37

Question : If $a^{3}+\frac{1}{a^{3}}=2$, then the value of $\frac{a^{2}+1}{a}$ is ($a$ is a positive number):

Option 1: 1

Option 2: 2

Option 3: 3

Option 4: 4

Question : If the sum of a number and its reciprocal is 2. Then the number is:

Option 1: 0

Option 2: 1

Option 3: –1

Option 4: 2

Question : The number of eggs normally released during one menstrual cycle is :

Option 1: 3

Option 2: 2

Option 3: 1

Option 4: 4

Question : In a 7-digit number 89476*2, what is the smallest possible value of * such that the number is divisible by 8?

Option 1: 2

Option 2: 1

Option 3: 4

Option 4: 3