Question
After 7 years, the age of Reena will be 5 years less
than 3 times of her age, 4 years back. What is Reena’s present age?Solution
Let Reena’s present age be x years. After 7 years, her age will be = x + 7 4 years back, her age was = x - 4 Now according to question, => x + 7 = 3(x – 4) – 5 => x + 7 = 3x – 12 – 5 => x + 7 = 3x – 17 => x = 12 years

Which of the following options gives the value of 2999² – 999²?
If √c + (1/√c) = 7, then find the value of c + (1/c).
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A certain number of students from school X appeared in an examination and 30% students failed. 150% more students than those from school X, appeared in ...

If sin 28° = 15/17 , then tan 62° = ?
If p = 28 - q - r and pq + r(q + p) = 182, then find the value of (p² + q² + r²).
The value of:
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