Question
In an office, the ratio of the number of males to number
of females is 7:3. If 2 males joined the class and 5 females left the class, then the ratio of number of males to that of females in an office would become 5:2. Find the actual number of females in the class.Solution
Let initially the number of males and females in an office be 7x and 3x respectively. According to the question, => (7x + 2) : (3x – 5) = 5:2 => 14x + 4 = 15x – 25 => x = 29 Therefore, number of females in an office = 3 x 29 = 87
What will come in the place of questions (?) mark in the following questions.
1204, 1218, ? , 1267, 1302, 1344
What will come in place of the question mark (?) in the following series?
2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?
What will come in place of the question mark (?) in the following series?
10, 135, ?, 226, 234, 235
- What will come in place of (?) in the given number series.
3, 6, 13, 26, 43, ? What value should come in the place of (?) in the following number series?
5670, 1620, 540, 216, 108, ?
32, 48, 72, 108, 162, ?
143 119 107 101 98 ?
1236, 1445, 1675, 1933, 2226, ?
58 83 133 ? 308 433
74, 84, 64, 104, ?, 184
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