sum invested at a certain rate of compound interest, compounded annually amounts to Rs.12,240 after 2 years and amounts to Rs. 17,625.6 after 4 years. If 60% of the sum is invested in the simple interest of 7p.a 10 years, then find the simple interest earned.
Let the sum invested = Rs. 'K' Let the rate of interest = 'y'% p.a. Then, according to the question K X {1 + (y/100)} ² = 12,240 ....... (I) And K X {1 + (y/100)} ⁴ = 17625.6 ........ (II) On dividing equation (I) from equation (II), we have. {1 + (y/100)} ² = 1.44 Or, 1 + (y/100) = 1.2 Or (y/100) = 0.2 So, y = 20 Therefore, sum invested = 12240 ÷ {(100 +20)/100} ² = 12240 ÷ 1.44 = Rs. 8,500 so, sum invest at simple interest= 8500×60/100=5100 so simple interest earned =5100×7×10/100=3570rs
Select the number from among the given options that can replace the question mark (?) in the following series.
16, 35, ?, 217, 653, 1309
What should come in place of '?' in the given series?
18 32 60 116 228 ?
Choose the pair which is related in the same way as the words in the first pair from the given choices.
CRICKET : PITCH :: SKATING : ________________
Statements: All computers are laptops. Some laptops are heavy. All heavy is wood.
Conclusion I: All laptops are computers.
Conclusion II: ...
Insert arithmetical signs in the equation for it to be correct
8 ? 4 ? 2 = 16
Select the option that is related to the third word in the same way as the second word is related to the first word.
Resistance : Ohm :: Angle : ?
Four of the following five are equal in a certain way and form a group.
Which one is not related to that group?
MQ, BF, JN, UX, CG
Which letter-cluster from the options will replace the question mark (?) to complete the given series?
ASDF, BUGJ, CWJN, ?
In the given letter-cluster pairs, the first letter-cluster is related to the second letter-cluster following a certain logic. Study the given pairs ca...
A series is given with one term wrong. Select that wrong term from the given alternatives.
PNM, RQQ, TTU, VWZ, XZC
