Question
The average of three numbers is 21. The first number is
double the second, and the third number is double the first. Calculate the sum of the first and third numbers.Solution
Let 2nd number be 'x' Therefore, 1st number = 2x And, 3rd number = 2 X 2x = 4x Therefore, x + 2x + 4x = (21 X 3) = 63 ATQ; 7x = 63 Or, x = 9 Required sum = 2x + 4x = 6x = 6 X 9 = 54 Hence, option a.
Which of the following country hosts first meeting of Governing Board of BIMSTEC Energy Centre (BEC)?
Where did Uber launch its first water transport service in Asia?
The strategic technology alliance Pax Silica, which India joined to strengthen supply chains for electronics and critical minerals, held its first summi...
How many monuments were illuminated as part of the ‘Ek Desh Ek Dhadkan’ campaign?
Which eminent Indian astrophysicist received the COSPAR Harrie Massey Award 2024?
What new feature does Version 2.0 of the ‘FloodWatch India’ app include?
According to the Perpetual Capital Hurun India Impact 50 (2026) sustainability rankings, which company secured the top position with 53.9 points?
 Which of the following frontier highways is all set to be constructed near the China border by the year 2027 ?
What is the purpose of the Joint Group of Customs (JGC) meetings between India and Bhutan?
- Which indigenous CFD software did VSSC announce for commercial launch?
Relevant for Exams:
