5-[4-{3-(3-3-6)}] is equal to:

Evaluate: ।।।।।

Three positive numbers are in the ratio of 11 : 12 : 15. If the sum of the squares of those numbers is 1960, then the sum of the numbers is

Sum of two numbers is 15 and sum of their reciprocals is . The two numbers are

QR is the chord of a circle with center o. p is a point on major arc QR as shown in figure. What is the value of ∠QPR + ∠OQR?

If the instalments are paid at the end of every year, what annual payment will discharge a debt of Rs. 7,200 due in 3 years at 20% per annum simple interest?

If 2sin²θ–5sinθcosθ+7cos²θ=1then possible values of tan θ are

In a school of the boys are same in number as of the girls and   of the girls are same in number as    of the boys. The ratio of the boys to girls in that school is: