Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is
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The least number that must be substracted from 63520 to make the result a perfect square is
The value of sinθ+sin∅cosθ+cos∅ + cosθ-cos∅sinθ-sin∅ is
In a triangle ABC, OB and OC are the bisectors of angles ∠ B and ∠C respectively. ∠BAC = 60°. Then the angle ∠BOC will be
Which of the following is a true statement?
If xy (x + y) = m, then the value of x3 + y3 + 3m is:
If x = 313- 3-13, then 3x3 + 9x value is
Gautam goes to office at a speed of 12 kmph and returns home at 10 kmph.His average speed is