One ticket to a show costs Rs. 10. Wasif buys a total of 6 tickets for the show using a coupon that gives him a 15% discount. Shabnam buys 7 tickets using a coupon that gives a 20% discount. How much more did Shabnam pay than Wasif?

A teacher measures the heights of 9 students in her class as follows (in centimetres) 151 , 151 , 112 , 137 , 147 , 156 , 151 , 153 , 111 What is the median of their heights?

An integer is divided by 5 and gives a remainder of 2. The resulting quotient is divided by 7 and gives a remainder of 6. The resulting quotient of this is divided by 9 and gives a quotient of 1 and a remainder of 2. What is the number?

A square park has an area of 1225 sq. m. It has to be fenced. The fencing will require use of a wire that must be able to enclose the park 4 times, and each circuit of the wire would be 2 % greater than the perimeter of the park. What is the length of wire (in metres) needed for this?