Let the father’s age be 4x years Mother’s age = 3x years According to question (4x + 3x)/2 = 42 7x/2 = 42 x = (2 × 42)/7 x = 12 years Mother’s age = 3x = 3 × 12 = 36 years
10 women and 12 men complete a certain piece of work in 30 days, if each women takes thrice the time taken by a man to finish the work.
Quantity...
The total number of even factors of 25 × 33 × 52 is:
There are 6 blue pens, 5 black pens and 4 green pens in a bag. Three pens are chosen randomly.
Quantity I – The probability of their bein...
If a + b2 + c2 = 16, x2 + y2 + z2 = 25 and ax + by + cz = 20, then the value of (a+b+c)/(x+y+z)
The expression of (cot θ + cosec θ −1) / (cot θ − cosec θ+1) is equal to
If -5 ≤ x ≤ 3 and -1 ≤ y ≤ 0, then the minimum value of 2y – 3x is:
The simple interest accrued on a sum at the rate of 10% p.a. for two years is Rs. 5,000.
Quantity I – What will be the compound interest o...
If (x - 1/x)2 = 3, then the value of x6 + 1/x6 equals
If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?
If a + 1/a = -2 then the value of a1000 + a- 1000 is