If the sum of 28 and 22 is multiplied by 8, what is the result?
400
\((28 + 22) \times 8 = 50 \times 8 = 400\).
Two numbers are in ratio 7:9, and their sum is 128. Find the numbers.
If \(x + 2y = 14\) and \(x - y = 5\), find x.
In a tournament of 7 players, each player plays every other player once. How many matches are there?
If the ratio of two numbers is 3:5 and their sum is 64, find the numbers.
Arrange the following lamps based on the increasing power rating and energy consumption to provide the same level of Illumination or lighting
A. Incandescent Lamp with efficacy of 10 lumens/watt
B. Compact fluorescent lamp (CFL) with efficacy of 60 lumens/watt
C. Halogen lamp with efficacy of 20 lumens/watt
D. Mercury vapour lamp with efficacy of 40 lumens/watt
E. Light Emitting diode (LED) lamp with efficacy of 80 lumens/watt
Choose the correct answer from the options given below: