Question
A sum increases by 60% in 10 years at a certain rate of
simple interest per annum. By what percentage will the same sum increase in 6 years at the same rate of simple interest per annum?Solution
Let the rate of interest and principal amount be R% and Rs. P respectively, According to the question, P+ (P x R x 10) ÷ 100 = 1.60 x P R = 6% Hence, the sum becomes after 6 years = P + (P x 6 x 6)/100 = Rs. 1.36P Thus, the sum becomes increases by = (1.36P-P) /P x 100% = 36%  By 36% the same sum will increase in 6 years at the same rate of simple interest per annum.
105   107   111   114   ?   127
8 6 2 ? -1 9.5
...64Â Â Â 48Â Â Â 36Â Â Â 22Â Â Â Â 16Â Â Â Â 8
(45)2 ÷ ∛729 + (35)2 ÷ 1.4 =?
24, 33, 50, ?, 108, 149
16 4 2 1.5 1 1.875
...Find the wrong number in the given series.
3 1.5 1.5 ? 4.5 11.25
...18Â Â Â Â Â Â Â Â Â Â 434Â Â Â Â Â Â Â Â 642Â Â Â Â Â Â Â Â 746Â Â Â Â Â Â Â Â 798Â Â Â Â Â Â Â Â ?
...720    ?     240     180      144     120
...If  204    196       223   x  284
Then, what is the average of the numbers of the above series?
...
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