Question
The average of five positive numbers is 56. If the first
number is three-fourth of the sum of the last four numbers, then the average of the last four numbers is:Solution
Average of 5 numbers =56 first number is three-fourth of the sum of the last four numbers. Now, Let the sum of last four numbers be 4x  First number = 3x Sum of all the elements- 4x + 3x = 56 x 5 7x = 280  x = 40.  The average of the remaining four numbers = 4x/4 = 40
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 If the sum of two numbers is 45, and their difference is 9, what are the two numbers?
After swapping its digits, a two-digit number becomes 17 less than 200% of the original number. The sum of the digits is 8. Find the original number.
In a class, 2/5 of the students are girls and rest are boys. If 4/9 of the girls and 1/3 of the boys are absent, what part of the total number of studen...
A number gives a remainder 34 when divided by 391. What remainder will it leave when divided by 17?
How many two-digit even numbers can be formed using the digits 3, 4, 5, 7, and 8, ensuring that no digit is repeated?
How many whole numbers between 100 and 750 are multiples of both 18 and 24?
- Find the greatest common divisor (GCD) of (x 2 Â - 9x + 14) and (x 2 Â + x - 56).Â
Product of two consecutive positive even numbers is 840. Find the sum of the digits of the two numbers. Â
- Find the greatest 3-digit number which when divided by 11 or 16 leaves 3 as remainder.
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