Solution:- Let us assume the two numbers be, P and Q, Then, $P = 10P$ … [because it comes in tens digit] As per the condition given in the question, $PQ = 8$ … [equation (i)] $10P + Q – 18 = 10Q +...
14. Find two natural numbers which differ by 3 and whose squares have the sum of 117.
Solution:- let us assume the two natural numbers be $y$, $y – 3$ As per the condition given in the question, \[{{y}^{2}}~+\text{ }{{\left( y-3 \right)}^{2}}~=\text{ }117\] Then, \[{{y}^{2}}~+\text{...
13. The sum of the square of two numbers is 233. If one of the numbers is 3 less than twice the other number. Find the numbers.
Solution:- let us assume the two numbers be y, $2y – 3$ As per the condition given in the question, \[{{y}^{2}}~+\text{ }{{\left( 2y-3 \right)}^{2}}~=\text{ }233\] Then, \[{{y}^{2}}~+\text{...
12. Three consecutive natural numbers are such that the square of the first increased by the product of other two gives 154. Find the numbers.
Solution:- let us assume the three consecutive natural number be $P – 1$, $P$ and $P + 1$ As per the condition given in the question, \[{{\left( P-1 \right)}^{2}}~+\text{ }\left( P \right)\text{...
11. The sum of the square of 2 consecutive odd positive integers is 290. Find them.
Solution:- let us assume the two consecutive odd positive number be P and P + 2 As per the condition given in the question, \[{{P}^{2}}~+\text{ }{{\left( P\text{ }+\text{ }2 \right)}^{2}}~=\text{...
10. Two natural numbers differ by 4. If the sum of their square is 656, find the numbers.
Solution:- Let us assume the two numbers be, P and Q. As per the condition given in the question, \[{{P}^{2}}~+\text{ }{{Q}^{2}}~=\text{ }656\] … [equation (i)] P – Q = 4 P = 4 + Q … [equation (ii)]...
9. A two digit number is four times the sum and 3 times the product of its digits, find the number.
Solution:- Let us assume the two numbers be, P and Q, Then, $P = 10P$ … [because it comes in tens digit] As per the condition given in the question, $PQ = 4(P + Q)$ $4(P + Q) = 10P +Q$ … [equation...
8. The difference of the square of two natural numbers is 45. The square of the smaller number is 4 times the larger number. Determine the numbers.
Solution:- Let us assume the two numbers be, P and Q, Q being the bigger number. As per the condition given in the question,\[{{Q}^{2}}~-{{P}^{2}}~=\text{ }45\] … [equation (i)] \[{{P}^{2}}~=\text{...
7. The sum of the square of 2 positive integers is 208. If the square of larger number is 18 times the smaller number, find the numbers.
Solution:- Let us assume the two numbers be, P and Q. As per the condition given in the question, \[{{P}^{2}}~+\text{ }{{Q}^{2}}~=\text{ }208\] … [equation (i)] \[{{Q}^{2}}~=\text{ }18P\] …...
6. Divide 25 into two parts such that twice the square of the larger part exceeds thrice the square of the smaller part by 29.
Solution:- Let us assume the two numbers be A and B, B being the bigger number. As per the condition given in the question, $A + B = 25$ … [equation (i)] \[2{{B}^{2}}~=\text{ }3{{A}^{2}}~+\text{...
5. A two digit number is such that the product of the digits is 14. When 45 is added to the number, then the digit are reversed. Find the number.
Solution:- Let us assume the two digits be MN As per the condition given in the question, Product of $2$ digits is $18$, $MN = 14$ … [equation (i)] $45$ is added to the number, then the digit are...
4. A two digit number is such that its product of its digit is 18. When 63 is subtracted from the number, the digits interchange their places. Find the number.
Solution:- let us assume two digits be PQ. As per the condition given in the question, Product of $2$ digits is $18$, $PQ = 18$ … [equation (i)] 63 is subtracted from the number, the digits...
3. The sum of a number and its reciprocal is \[2\frac{9}{40}\] . Find the number.
Solution:- Let us assume the number be B. As per the condition given in the question, B + 1/B =\[2\frac{9}{40}\] So, B + 1/B = 89/40 \[({{B}^{2}}~+\text{ }1)/B\text{ }=\text{ }89/40\] Cross...
2. The sum of 2 numbers is 18. If the sum of their reciprocals is ¼, find the numbers.
Solution:- Let us assume the numbers be P and Q. As per the condition given in the question, The sum of $2$ numbers is $18$, $P + Q = 18$ … [equation i] the sum of their reciprocals is $¼$, $1/P +...