Find out the wrong number in the series given below : 1, 2, 8, 33, 148, 760, 4626 A.      8 B.      148 C.      760 D.      4625 Sol: 2nd term  = 1st term × 1 + 12 = 1 × 1 + 12 = 2  3rd term  = 2nd term × 2 + 22 = 2 × 2 + 22 = 8  4th term = 3rd term × 3 + 32 = 8 × 3 + 32 = 33  5th term = 4th ...

Find a wrong number in a series: 7, 28, 63, 124, 215, 342, 511. A.      7 B.      28 C.      124 D.      215 E.       342 Sol: Clearly the correct sequence is : 23−1,33−1,43−1,53−1,63−1,73−1,83−1. ∴28 is wrong and should be replaced with33−1 i.e. 26. Hence, the answer is (b).

Arun, Kamal and Vinay invested Rs. 8000, Rs. 4000 and Rs. 8000 respectively in a business. Arun left after six months. If after eight months, there was a gain of Rs. 4005, then what will be the share of Kamal? A. Rs.890 B. Rs.680 C. Rs.790 D. Rs.980 E. Rs.590 Sol: Arun : Kamal ...

The marked price of an article is Rs. 300. It is sold for Rs. 177.84 after giving three successive discounts of 20%, x% and 5%. What is value of x ? A.      22 B.      18 C.      24 D.      15 Sol: Given:  Marked price = Rs.300  Three discounts = 20%, x% and 5%  Selling price = Rs.177.84  ...

Find out the wrong number in the series given below :15, 16, 34, 105, 424, 2124, 12756A.      34B.      105C.      2124 D.      16 Sol: 2nd term = 1st term × 1 + 1 = 15 × 1 + 1 = 16  3rd term = 2nd term × 2 + 2 = 16 × 2 + 2 = 34  4th term = 3rd term × 3 + 3 = 34 × 3 + 3 = 105  5th term = 4th ...

Ravi and Kavi start a business by investing Rs. 8000 and Rs. 72000, respectively. Find the ratio of their profits at the end of year. A.      7:9 B.      1:9 C.      5:9 D.      2:9 Sol: Their profits must be divided in the ratio of their investment .So , Ravi's profit : Kavi's profit =8000:72000 ...

X, Y and Z invested Rs. 4,000, Rs. 6,000 and Rs. 8,000 respectively in a business. They invested the money for 3, 2 and 4 years respectively, If the total profit is Rs. 56,000, then what is the share of Y in the profit? Rs. 18,000 Rs. 12,000 Rs. 15,000 Rs. 9,000 Sol: X, Y and Z invested Rs. ...

A, B and C invested Rs. 8,000, Rs. 4,000 and Rs. 8,000 respectively in a business. A left it after six months and at the end of eighth month, there was a gain of Rs. 4,005. Then the share of B in it is (in rupees) Rs. 690 Rs. 790 Rs. 890 Rs. 990 Answer: 890 Sol: Investment ...

A and B together can do a piece of work in 12 days which B and C together can do in 16 days. After A has been working at it for 5 days and B for 7 days, C finishes it in 13 days. In how many days C alone will do the work ? 24 days 16 days 48 days 36 days Sol: