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Question 1:

What is the value of $\mathrm{x}$ for which $\mathrm{x}, \mathrm{x}+1, \mathrm{x}+3$ are all prime number?

Question 2:

The sum of two positive integers is 42 and their difference is 4 . Find their product.

Question 3:

The sum of squares of two natural consecutive odd numbers is 1570 , the sum of the numbers is :

Question 4:

Find the greatest number of 4 digits which, When divided by 12,16 and 24 leaves 5 remainder in each case

Question 5:

The sum of two numbers is 25 and the product is 78 . What should be the sum of their reciprocals?

Question 6:

What will be Quotient if 92,800 is divisible by 4 .

Question 7:

If the ratio of two numbers is $2: 3$ and their L.C.M. is 54 , then the sum of the two numbers is

Question 8:

When a number is divided by 195 it gives remainder 47 . If the same number is divided by 15 . Find the remainder:

Question 9:

What is the number that is 20% more than 80?

Question 10:

Find the sum of the following: $\frac{1}{5}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+\frac{1}{25} \ldots \ldots \ldots \ldots \frac{1}{90}$