Question
A girl’s age is 135% of what it was 10 years ago, but
75% of what it will be after 10 years. What is her present age?Solution
Let the girl's present age be 'x' years. According to question, => 1.35 × (x-10) = 0.75 × (x+10) => 1.35x – 13.5 = 0.75x + 7.5 => 0.6x = 21 => x = 35 years
79, 248, ?, 225, 125, 206
840, 2520, 630, 3150, ?, 3675
7, 8, ?, 52, 209, 1046
70, 95, 145, ?, 320, 445
123, 122, 114, 87, ?, -102
24 36 72 108 216 ?
- What will come in place of the question mark (?) in the following series?
24, 35, 57, 90, 134, ? What value should come in the place of (?) in the following number series?
24, 45, 133, 531, 2655, ?
What value should come in the place of (?) in the following number series?
1.5, 2.5, 4, 6, ?, 11.5
1024, 256, 768, 192, 576, 144, ?