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The expression "reinventing the wheel" is an idiom that means unnecessarily creating or doing something that already exists and is well-established.
Six years ago, the age ratio of A to B was 5:6. In nine years, their age ratio will become 8:9. Determine the difference between their current ages.
Which of the following is a video format?
A’s age is 120% of what he was 4 years ago, But 60% of what it will be after 4 years. What is his present age?
The ratio of age of A and his son is 10:3. If the difference of their ages 8 year ago is 28, then find the sum of ages of A and his son 12 year hence.
The heights (in cm) of 9 basketball players in a tournament are as follows: 178, 182, 175, 180, 184, 179, 177, 181, 183