1-[5-{2+(-5+6-2)2}] is equal to 

$$ (17)^{2} + 6 × (13)^{2}-212×6$$

An arc of 30 ° in one circle is double an arc in a second circle, the radius of which is three times the radius of the first. Then the angles subtended by the arc of the second circle at its center is 

Panu, Jiban and Jalil can complete a certain task individually in 30, 20 and 60 days, respectively. Jiban started work on the task and Panu and Jalil agreed to help Jiban on every third day. How many days will it take to complete the task?

The sum of the squares of 2 number is 146 and the square root of one of them is 5. The cube of the other number is 

A sum of Rs. 110 is in the form of Rs. 2, Rs. 1 and 50 paise coins in the ratio of 1 : 2 : 3, respectively. How many 50 paise coins are there?

A number is doubled and 9 is added. If the resultant is tripled, it becomes 75. What is that number? 

A student has to score 33% marks to pass. He gets 117 marks and fails by 81 marks. Find the student’s marks percentage?