If x2 + y2 = 25 and xy = 12, then the value of x-1 + y -1 is _____.
(D) Both (B) and (C)
What is the rule for the pattern in the following diagram?
(A) Multiply the number of toys by 3
(B) Increase the number of toys by 2
(C) Increase the number of toys by 3
(D) Increase the number of toys by 2 and then by 3
Bhawna made a notebook of 50 pages and she numbered the pages from 1 to 50. How
many times did she use the digit '2'?