1. A milk seller has certain amount of milk to sell. In what ratio he should mix water to gain 10% by selling the mixture at the same cost price?
- (A) 1:10
- (B) 1:15
- (C) 1:20
- (D) 1:5
- (E) 1:12
2. Given that cos x + cos y + cos z + cos w = 4. Which of the following can be the value of sin2 x + sin3 y + sin4 z + sin5 w?
- (A) 0
- (B) 1
- (C) 3
- (D) −1
- (E) 4
3. Let A, B and C be distinct positive integers such that the A × B × C = 2001. What is the largest possible value of the sum A + B + C?
- (A) 23
- (B) 55
- (C) 99
- (D) 111
- (E) 671
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