Question
Litmus paper, used to test pH levels, is derived from
which organism?Solution
Litmus paper is created using dyes extracted from lichens. It is an essential tool in chemistry for determining the acidic or basic nature of substances, changing color based on the pH level of the solution it is exposed to.
Sum of the three numbers is 180. Ratio of the first number to second number is 4:7 and the ratio of second number to third number is 7:9. Find the secon...
Consider a three-digit number where the middle digit (tens place) is 3. If the digits in the hundreds and ones places are swapped, the new number become...
The cube of the difference between two given natural numbers is 1728, while the product of these two given numbers is 108. Find the sum of these two giv...
A number is divided by 50. The quotient obtained is 60% more than the divisor, and the remainder is 80% of the divisor. Find the original number.
Find the third proportion of 30 and 12.
- If '81x4y' is a five-digit number which is divisible by 72, then find the value of (3x + 5y).
Find the sum of 1² + 3² + 5² + 7²……………………………….23².
...The ratio of two natural numbers 'x' and 'y' is 9:13, respectively. When 30 is added to 'x' and 15 is subtracted from 'y', the ratio of 'x' to 'y' becom...
A = (7/3) × B and C = (1/14) × A. If (A + B + C) = 360, then determine the value of (10C – B).
- Find the median of the following observations:
120, 125, 115, 130, 140, 135, 145
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