if $$\sqrt { 11- 3\sqrt { 8}}=a+b\sqrt { 2}$$, then what is the value of (2a+3b)?

Find the second diagonal of a rhombus when it’s first diagonal length is 12 cm and its side is 10 cm?

P and Q are center of two circles with radii 9 cm and 2 cm respectively, where PQ = 17 cm, R is the center of another circle of radius x cm, which touches each of the above two circles externally. If ∠PRQ = 90 °, then the value of x is 

What value will come in place of question mark (?) in the following questions?

(?)² + 1 = 212 + 172

A shopkeeper sold sarees at Rs. 266 each after giving 5 % discount on labelled price. Had he not given the discount, he would have earned a profit of 12 % on the cost price. What was the cost price of each saree? 

Travelling at 80km/hr, Praveen reaches his destination at a certain time. He covers 3/5th of his journey in 2/5th at the time. At what speed (in km/hr) should he travel to cover the remaining journey, so as to reach his destination on time? 

The equivalent single discount for two successive discounts of 15% and 10% is

Directions: Find the wrong number in the following number series:

The ratio between Males who use their coupon in Pedicure to that of in Spa is 4: 5, while ratio between Females who use their coupon in Haircutting to that of in Spa is 6: 11. Find total number of people who use their coupons in Spa.