Discussion
Home ‣ Aptitude ‣ Numbers See What Others Are Saying!
- Question
Find the sum to 200 terms of the series 2 + 5 + 7 + 6 + 12 + 7 + ....
Options- A. 30,400
- B. 30,200
- C. 34,600
- D. 38,400
- Correct Answer
- 30,400
Explanationwe can treat every two consecutive terms as one.
So, we will have a total of 100 terms of the nature:
(2 + 5) + (7 + 6) + (12 + 7).... => 7, 13, 19,....We know the sum of n terms
Now, a= 7, d=6 and n=100
Hence the sum of the given series is
S= 100/2 x[2 x 7 + 99 x 6]
=> 50[608]
=> 30,400. - 1. Rs 1000 is being charged at 50% per annum. what is the interest for 3rd year at compound interest?
Options- A. 1122
- B. 1025
- C. 1125
- D. 625 Discuss
- 2. Find the regular polygon whose interior angel is 150 more than exterior angle. note the total sum of interior and exterior angle should be 180 at one point ?
Options- A. 12
- B. 24
- C. 36
- D. 6 Discuss
- 3. The minimum number of half years in which a sum of money kept at 60% compound interest will be quadrupled is ?
Options- A. 2
- B. 4
- C. 3
- D. 6 Discuss
- 4. Which of the following is equivalent to 0.565656...?
Options- A. 56/100
- B. 56/1000
- C. 56/99
- D. 560/90 Discuss
- 5. A sum of money invested at compound interest amounts to Rs. 800 in 3 years and to Rs. 840 in 4 years. The rate of interest per annum is
Options- A. 6%
- B. 4%
- C. 5%
- D. 7% Discuss
- 6. What is the value of (91 + 92 + 93 + ......... +140)?
Options- A. 5775
- B. 11550
- C. 17325
- D. 23100 Discuss
- 7. What is the difference between the compound interests on Rs. 5000 for 1 1/2 years at 4% per annum compounded yearly and half-yearly?
Options- A. 2.04
- B. 3.04
- C. 4.04
- D. 5.04 Discuss
- 8. 854*854*854-276*276*276854*854+854*276+276*276=?
Options- A. 546
- B. 578
- C. 607
- D. None of these Discuss
- 9. What is the SI on Rs.2500/- at the rate of 12% per annum for 8 years?
Options- A. 2200
- B. 2300
- C. 2400
- D. 2500 Discuss
- 10. If a positive integer n, divided by 5 has a remainder 2, which of the following must be true?
Options- A. n is odd
- B. n + 1 cannot be a prime number
- C. (n + 2) divided by 7 has remainder 2
- D. n + 3 is divisible by 5 Discuss
More questions
Correct Answer: 1125
Explanation:
Total amount for two years =
Now , interest for third year =
Correct Answer: 24
Explanation:
Sum of Interior angle is 180 .
and it is given that interior angle is 150 more than exterior,
so let exterior angle is x then interior will be x+150
now , interior + exterior =180
x+150+x=180
x=15
now , number of sides of polygon = 360 / exterior angle
n = 360 / 15
n = 24
Correct Answer: 6
Explanation:
Let us assume Amount be 100 Rs and we calculate in CI
First year 60% of 100 = 60 amount (100+60) is 160
Second year 60% of 160 = 96 amount (160+96) is 256
Third year 60% of 256 =153.6 amount (256+153.6) is 409.6
Here the Amount of 100 Rs is quadrapled in 3 years.
One year contains 2 half years
Three year has 6 half years.
Therefore, It takes 6 half years.
Correct Answer: 56/99
Correct Answer: 5%
Explanation:
S.I. on Rs.800 for 1 year
=Rs[840 - 800]
= Rs.40
Rate
=(100x40/800x1)%
= 5%
Correct Answer: 5775
Correct Answer: 2.04
Explanation:
C.I. when interest
compounded yearly=rs.[5000*(1+4/100)(1+1/2*4/100)]
= Rs. 5304.
C.I. when interest is
compounded half-yearly=rs.5000(1+2/100)^3
= Rs. 5306.04
Difference = Rs. (5306.04 - 5304) = Rs. 2.04
Correct Answer: 578
Explanation:
Given exp . is like this
so ans = 854 - 276 = 578
Correct Answer: 2400
Explanation:
S.I=PNR/100
Correct Answer: n + 3 is divisible by 5
Explanation:
You can find the integers which when divided by 5 have a remainder 2 by adding 2 to all multiples of 5. So we have n = 7 , 12, 17, 22 etc.
From this series we can see that n does not have to be odd.
Also n + 1 can be a prime because, for example, 12 + 1 = 13
And (n + 2) / 7 has a remainder 2 in some cases but not all.
Remember the question asks us for what MUST be true, and we see that none of the statements are true in all cases. However, adding 3 to any of the values of n will always give a multiple of 5.
Comments
There are no comments.More in Aptitude:
Alligation or MixtureApproximationAreaAverageBanker's DiscountBoats and StreamsCalendarChain RuleClockCompound InterestDecimal FractionDiscountElementary AlgebraFind the Missing CharacterHeight and DistanceLinear EquationLogarithmLogicNumber SystemNumbersOdd Man Out and SeriesOrder of MagnitudePartnershipPercentagePermutation and CombinationPipes and CisternPlane GeometryProbabilityProblems on AgesProblems on H.C.F and L.C.MProblems on NumbersProblems on TrainsProfit and LossQuadratic EquationRaces and GamesRatio and ProportionSets and FunctionsSequential Output TracingSimple InterestSimplificationSquare Root and Cube RootStatisticsStocks and SharesSurds and IndicesTime and DistanceTime and WorkTrue DiscountUnitary MethodVolume and Surface AreaWork and WagesProgramming
Copyright ©CuriousTab. All rights reserved.