problem -1.: A collection of 36 cards consists of 4 sets of 9 cards each. The 9 cards in each set are numbered 1 through 9. If one card has been removed from the collection, what is the number on that card?
a) The units digit of the sum of the numbers on the remaining 35 cards is 6.
b) The sum of the numbers on the remaining 35 cards is 176
problem -2.:
In the X-Y co-ordinate plan, point (r,s) lies on a circle with center at the origin. What is the value of r^2+s^2?
a) The circle has radius 2.
b) The point ( √2, √-2) lies on the circle.
Kindly help with some methods for solving the above 2 problems
a) The units digit of the sum of the numbers on the remaining 35 cards is 6.
b) The sum of the numbers on the remaining 35 cards is 176
problem -2.:
In the X-Y co-ordinate plan, point (r,s) lies on a circle with center at the origin. What is the value of r^2+s^2?
a) The circle has radius 2.
b) The point ( √2, √-2) lies on the circle.
Kindly help with some methods for solving the above 2 problems
