Question
If a sum when placed at compound interest grows to
Rs.6,400 in 2 yrs and to Rs. 8,000 in 3 yrs, find the rate percent p.a.Solution
Let the principal be P. ∴ P + CI for 3 yrs = Rs. 8,000----- (i) And P + CI for 2 yrs = Rs. 6,400----- (ii) Subtracting (ii) from (i), we get CI for the 3rd yr = 8,000 – 6,400 = Rs. 1600 Thus, CI calculated in the 3rd yr is basically the interest on the amount generated after 2 yrs which is Rs. 6,400. R = (SI × 100)/(P × T) = (1600 × 100)/(6400 × 1) = 25 % p.a.
Statement: A = B ≥ C ≥ D, B < F ≤ K < M
Conclusions:
I. D < F
II. M < A
III. K > D
Statement:  A = X ≥ W = B < C = O
Conclusions:
I. A ≥ B
II. W < O
III. X > O
IV. C > A
...Statements: E & F, H # I, G $ F, E % D, G @ H
Conclusions:Â Â Â I . D $ FÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â II. F @ IÂ Â Â Â Â Â Â Â Â Â Â Â ...
Which of the following expressions will be true if the expression P > Q = R < S = T ≤ U = V is definitely true?
Statements: G > N > P = E ≥ H < L; M < E < B < C = Q > X; U > W > Y = Q > H
Conclusions:
I). U > P
II). Y > P
...Statements:  M = R ≥ S , N = O > Q, Q > W = A < S
Conclusions :
I. N ≥ S
II. W > R
III. O ≤ S
ÂStatement: B = E ≥ F ≥ M < J < V ≥ R; M > A
Conclusion:
I. A ≥ R
II. B > A
...Which of the following symbols should replace the question mark in the given statement in order to make conclusion 'L > G' as well as 'B > X' definitel...
Statements: A $ B @ D & E @ G % H, F & A, G $ J
Conclusions: I.F & E II. J # B
...Statements: Q > W > X; J > W; Z < X < P
Conclusions:
I. P > Z
II. J > Q
III. W < P