Question
In Uttar Pradesh, the colour broadcasting of Doordarshan
was started in which year?Solution
Doordarshan became colorful in 1982, 23 years after the launch of the channel.
If 2x + y = 15 and xy = 18, then the value of (4x² - y²)

If a + b + c = 6, a² + b² + c² = 14 and ab + bc+ ca = 11, then what is the value of a³ + b³ +c³ –3abc?
- If n = 5 + √6, then find the value of (n + 1/n)².

If x = 19, then the value of x5 - 20x4 + 20x3 - 20x2 + 20x - 1 is
√(92×8 ×52+700) = ?
If 9 : 12 :: 12: x, and 28: 42:: 42: y, then the value of 2x + y is:
If 8x3 - 125y3 = (2x - Ay) X (Bx2 + 25y2 + Cxy), then find the value of 3 X (2A + 6B) - 2C.
A sum of Rs. 25,000 is invested in SIP 'G' which offers 7% p.a. simple interest for 7 years. The interest received from SIP 'G' is invested in SIP 'H' w...