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Let the present age of B be x years. A’s present age = (x + 3) years C’s present age = (x - 4) years According to question, => [(x + 3) + 8]/(x -6) = 5/4 => x = 74 C’s age, 12 years ago = (74 - 4) – 12 = 58 years
Find the average of first 17 whole numbers.
The sum of the digits of a two-digit number is 7. If 45 is subtracted from this number, the resulting number has its digits reversed. Determine the orig...
If we add 1 to the numerator and subtract 1 from the denominator a fraction becomes 1. It becomes 1/4 if we only add 7 to the denominator what is the fr...
If (64)2 – (36)2 = 20Z, the value of z is
Find the average of first 11 whole numbers.
Find the unit digit of (57 129 - 7).
If x and y are the two digits of the number 115xy such that this number is divisible by 90, then the value of x + y is:
Find the number of zeros at the end of the following expression:
12 × 16 × 25 × 40 × 45
In an examination, the number of those who have passed and the number of those who failed were in the ratio of 40 : 7. If 7 more had appeared and the nu...
The difference between the value of the number increased by 20% and the value of the number decreased by 30% is 120. Find the number.