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**Question 4 Find the right most non zero digit of 12! ? A 2 B 4 C 6 D 8 please explain in detail . I din't got the solution given for it.**

**7 to the power 13 + 6 to the power 12 + 1 to the power 11 + 4 to the power 7 how find out whether this expression is even or odd, how to solve this equation**

I hope the question is this $$((((7^{13}+6)^{12}+1)^{11}+4)^{7})$$ . If it is different please let me know.

$$7^{13}$$ is odd if we add 6 to it, it will still be odd. $$odd^{12}$$ is odd, if we add 1 to it it will become even. Now $$(even)^{11}$$ will be even and adding 4 to it will give even only. $$(Even)^{7}$$ is even so the final result is even. I hope it helps.

Thanks

**how can one improve his RC ability?**

**Can anyone explain me the solution of data interpretation test 4 of cat quotient**

Hi Shankho,

The graphs in the question show the growth rate for different sectors. It is also given that what is the contribution of each sector to the overall growth. The questions are fairly straight forward and are either observation based or require some calculation. For example, if we take the first question, it simply asks which sector saw the highest overall growth. So if you look at the graph, we can see the electricity sector consistently has a good growth rate. So it must have the highest overall growth. If you have some doubt in understanding the graph, please let us know.

Thanks

**If 'a' and 'b' are the roots of the equation x2+P∗x+Q=0x2+P∗x+Q=0. What is the quadratic equation whose roots are 'a' and '-b' ?**

**dealer deals only in colour TVs and VCRs. He wants to spend up to Rs.12 lakhs to buy 100 pieces. He can purchase a colour TV at Rs.10,000 and a VCR at Rs.15,000. He can sell a colour TV at Rs.12,000 and a VCR at Rs.17,500. His objective is to maximize profits. Assume that he can sell all the items that he stocks. Question 4 For the maximum profit, the number of colour TVs and VCRs that he should respectively stock are A 80, 20 B 20, 80 C 60, 40 D None of these please some explain this in detail!**

The person has 2 options

Colour TV- cost price 10k selling price 12k

VCR- cost price 15k selling price 17.5k

So, his profit margin on each device is

TV- 2k per piece and VCR 2.5k per piece.

Now, his objective is to maximize profits and not the profit percentage, so he should spend all the money i.e 12 lakhs. If the aim was to maximize profit percentage, he should have bought all 100 pieces of TV because its profit percentage is more than VCR.

Let he buys a Tvs and b VCR

then a+b=100

and 10a+15b=1200

silving it you will get, a=60 and b=40.

**Jeff bought a watch from a wholesale dealer at 28% from the original price.He then sold the watch on ebay and earned a profit of 33.33 % even after giving a discount of 20%.How much percent would he have marked as compared to the original price of the watch? A 10% B 30% C 20% D 15% Explanation Assume the original price of watch as 100. price at which Jeff bought = 72 price at which watch is sold = 72 + 33.33%72=96 thus marked price = 96/.8 = 120 ∴the price has been marked up by 20% compared to the original price. don't you guyz review your questions ...in questions it is said that Jeff brought watch at 28% of original price ..but in solution it is shown as he bought at discount of 28% ..**

Hi Vishmit, Sorry for the mistake. We have corrected it now. We regret the inconvenience caused to you. We will try our best that such typos don't occur in future. Thanks for pointing out the mistake.

**How is proficiency score calculated for the quant and verbal practice tests?**

Hi Shiv Raj

Proficiency score is based on what percentage of the questions you attempted and what percentage you got right. So it depicts how good you are in a particular topic.

Thanks

**how to learn syllogism??? lam not understanding d method..**

Ni Nivedha,

The best way to solve syllogism is to do it using Venn diagrams. It is the simplest method and also relatively faster once you get used to it. So I would suggest you learn to solve them using venn diagrams.

Thanks

**Eight persons of a family, A, B, C, D, E, F, G, and H are sitting around a circular table facing the centre but not necessarily in the same order. Each one of them holds a different profession, one of them is a teacher. It is also known that: (i) G is sitting third to the left of an actor who is neither E nor A. (ii) B is a scientist sitting to the right of E who is neither a lawyer nor a player. (iii) C is neither an engineer nor an actor, the doctor and the engineer are sitting adjacent to each other. F is not adjacent to B. (iv) The actor is neither opposite the scientist nor opposite C, who is adjacent to the businessman. (v) D, who is neither a doctor nor an actor, sitting opposite to the player who is either F or E. 1. Who is the lawyer? 2. Who is sitting two places away to the left of the doctor? 3. Which of the following ia a correct combination of a person and his profession. A. E - Actor B. A - Teacher C. D - Lawyer D. G - Businessman E. Both B and D. 4. Who is sitting opposite the teacher? 5. What is the Profession of H?**

Hi Archana,

There is a slight mistake in the question, if you can correct that then we can help you. In the statement I, it is said that actor is neither R nor A is an actor. There is a no character called R, so it is some typo. Please correct it and post it again, we will try our best to help.

Thanks

2,5,10 give the 2 0's. just look for the units place of the product of remaining numbers. no need to calculate the whole thing