Question
Ratio of present age of 'A' to that of 'B' is 5:8. If
the age of 'A' two years hence from now will be 22 years, then after how many years, the ratio of the age of 'B' to that of 'A' will become 5:4?Solution
Let the present ages of 'A' and 'B' be '5m' and '8m' years respectively.
So, 5m + 2 = 22
Or, 5m = 20
So, 'm' = 4
Present age of 'A' = 5m = 20 years
Present age of 'B' = 8m = 32 years
Let ratio of the ages of 'B' to 'A' becomes 5:4 after 'n' years.
So, (20 + n) : (32 + n) = 4 : 5
Or, 5 × (20 + n) = 4 × (32 + n)
Or, 100 + 5n = 128 + 4n
So, 'n' = 28
Hence, option C.
In a code language, 'PARENT’ is written as 'PWRANT' and 'SING' is written as 'SENG'.
How will 'TERMINATE' be written in the same language?
Which two signs should be interchanged to make the following equation correct?
18 − 23 × 455 ÷ 7 + 28 = 377
Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter...
If ‘+’ means ‘–’, ‘–’ means ‘×’, ‘×’ means ‘÷’, ‘÷’ means ‘+’, then what will come in place of the question mark...
Select the number from among the given options that can replace the question mark (?) in the following series.
3, 20, 121, 604, 2417, ?
Choose the next number in the series.
40, 52, 76, 88, 112, ?
In a certain code language, if GIFTED is written in TRUGVW, how will LUCID be written in the same code language?
Which of the following numbers will replace the question mark (?) in the given series?
420, 462, 506, ?, 600, 650, 702
Select the figure that will come next in the following series.
Question Figure:
Eight friends (A, B, C, D, E, F, G, H) sit around a circular table, all of them facing the centre. Only three people sit between G and D. D sits second ...
