Solution of The Word Problem in Technical Mathematics Review (2)

March 3, 2017 • Written by

This solution is for a word problem in Technical Mathematics Review (2). The word problem

states as follows:

The sum of the digits in a three- digit number is 12. The sum of the first and third digits is

one third of the middle digit. If the hundreds and ones digits are interchanged, the value of

the number is reduced by 99. Find the number.

Click the following link for detail solution

    Solution of The Word Problem in Review (2)

You are welcome to send word problem questions, I am always ready to help you.




What is the Square Root of 62627?

February 7, 2017 • Written by

Hi Sathwik,

Welcome to RRC Wise Guys Videos!

You asked: What is the square root of 62627?

From the pattern of perfect square of numbers 62627 is not a perfect square root because of the last digit 7. The whole number portion of the square root of 62627 is a three digit with the first digit 2, and 62627 is greater than 250^2 =62500 but smaller than 251^2(=62501+500)=63001…, so the square root of 62627 approximately equals to 250.3. For more detail please click the following link:

Solutions for Questions from Wiseguys videos

Hopefully it helps.

RRC Wiseguys


Calculus Worksheet: Find the Derivative for a Rational Fraction Using Different Methods (1)

January 10, 2017 • Written by


The following question was brought by a student in my Calculus workshop. Now I solved it by using three different method. They are by using Definition of Derivatives(Delta Process), applying Quotient Rule, and Finding Logarithmic Differential.

Obliviously, Calculus is based on Pre-Calculus, every step from the solution is connecting with the rules of Algebra…

Hopefully, it helps.


Find the Derivative for a Rational Fraction Using Different Methods (1)