The length of two chords AB and AC of a circle are 8 cm and 6 cm and ∠BAC=90º, then the radius of circle is

In a regular polygon, the exterior and interior angles are in the ration 1:4.The number of sides of the polygon is

The greatest value of $$ Sin^{4}θ+Cos^{4}θ $$ is:

A house and a shop were sold for Rs. 1 lakh each, In this transaction, the house sale resulted into 20 % loss whereas the shop sale into 20 % profit. The entire transaction resulted in:

If 3 toys are sold at the cost price of 4 toys of the same kind, the profit will be:

The HCF and LCM of two numbers are 12 and 336 respectively. If one of the number is 84, the other is

A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?

If $$ 5^{5x+1}=1 $$, then x equals