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Wednesday, February 20, 2013

CBSE Problem Solving Assessment (PSA) 2013- CBSE PSA grade IX Answer keys

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Answer keys.
Section A (English)
1-4, 2-3, 3-1, 4-3, 5-2, 6-4, 7-4, 8-2, 9-1, 10-2, 11-1, 12-4, 13-2, 14-2, 15-1, 16-3, 17-3, 18-4, 19-2, 20-2, 21-1, 22-1, 23-2, 24-2
Section B (Qualitative Reasoning)
25-3, 26-3, 27-4, 28-1, 29-2, 30-1, 31-4, 32-3, 33-4, 34-4, 35-4, 36-2, 37-4, 38-1, 39-4, 40-1, 41-4, 42-2,
Section C (Quantitative Resoning)
43-3, 44-3, 45-2, 46-2, 47-2, 48-1, 49-4, 50-4, 51-2, 52-3, 53-1, 54-2, 55-4, 56-3,57-4, 58-2, 59-2, 60-1
Our team is discussing the rest of the answers. Your patience will be highly appreciated.
On the contrary, the answers may not be 100% correct. The candidates are requested to discuss the answers in the comments. Scanned Question Paper will be added soon.
NOTE The answers Ticked in the Question Paper mostly differ from the correct answers. In order to provide you the Answer keys at the earliest possible there were some obstacles to the answers. We
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Post titleCBSE PSA Result 2013 conducted on 16 Feb 2013

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Post titleCBSE PSA Result 2013 conducted on 16 Feb 2013
Language Conventions:
Hindi: 1.3, 2.3, 3.2, 4.2, 5.1, 6.3, 7.4, 8.2, 9.1, 10.2, 11.3, 12.3,  13.1, 14.4, 15.2, 16.3, 17.2, 18.4, 19.3, 20.3, 21.4, 22.2, 23.1, 24.2
English: 1.4, 2.1, 3.1, 4.2, 5.2, 6.3, 7.3, 8.1, 9.2, 10.2, 11.4, 12.2, 13.3, 14.2, 15.2, 16.4, 17.1, 18.2, 19.3, 20.2, 21.2, 22.4, 23.1, 24.2
Qualitative Reasoning: 25.4, 26.3, 27.4, 28.2, 29.3, 30.4, 31.3, 32.4, 33.3, 34.2, 35.1, 36.2, 37.4, 38.4, 39.2, 40.4, 41.2, 42.2
Quantitative Reasoning: 43.5, 44.2, 45.2, 46.3, 47.1, 48.1, 49.3, 50.4, 51.1, 52.2, 53.4, 54.2, 55.2, 56.3, 57.4, 58.3, 59.4, 60.1
These answers may or may not be absolutely correct. Readers are encouraged to discuss their answers in the comments below.CBSE (Central Board of Secondary Education) conducted the Problem Solving Assessment Test (PSA) on 16th Feb 2013 for classes IX and XI. A lot of candidates appeared in the exam and are now waiting for the answer key of PSA 2013.  Candidates who has appeared in the the PSA test can download the answer key of PSA exam as soon it is released by authentic sources.CBSE initiated the Problem Solving Test as an attempt to replace the FA’s (Formative Assessments) of classes IX and X and to prepare students of Classes XI and XII for competitive exams. Candidates who attempt this test will be awarded a certificate in mid-June, but reports are unconfirmed as yet
Links to download answer key will be added by today. With the help of answer key, candidates can calculate their marks.
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Sunday, February 17, 2013

OLOGY QUESTION FOR CLASS 12 FIOR EXAM 2013

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Books for exam class 12sample question 2013

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Sample question for class 12 2013

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Subjective Test  

(i)         All questions are compulsory.

(ii)        Questions 1 to 7 are very short answer type questions. These questions carry one mark each.

(iii)       Questions 8 to 10 are short answer type questions. These questions carry four marks each.

(iv)       Question 11 is long answer type question. This question carries six marks.
Question 1 ( 1.0 marks)
Letf: R→ Rbe a function defined by f(x) = 2x+ 3. Find a function g: R → R satisfying the condition gof= fog= IR.
Question 2 ( 1.0 marks)
A function f: Z→ A, whereis defined as.
Without finding the actual inverse of f, show that fis bijective.
Question 3 ( 1.0 marks)
Let X= {1, 2, 3, 5, 6, 10, 15, 30}
Operations ‘*’, ‘’ and ‘Δ’ on Xare defined as follows:
a* b= LCM (a, b)
ab= HCF (a, b)
aΔ b=
Which of the given operations is (are) binary operation(s)?
Question 4 ( 1.0 marks)
If f:N→ Nis one-one and onto function, then find the value of the following expression.
Question 5 ( 1.0 marks)
Letf be any non-zero real valued function and let gbe a function given by g(x) = (k+ 2)x. Find the value of ksuch that gof = 2f.
Question 6 ( 1.0 marks)
If Y= {x: x∈ Nand x≤ 4}, then show that the relation Ron Ydefined by R= {(a − b): |a − b| is a multiple of 3} is nota trivial relation.
Question 7 ( 1.0 marks)
A function f: R→ Ris defined as f(x) = 3x−5.
Find αsuch that f(α) = f−1(α).
Question 8 ( 4.0 marks)
A function is defined as f(x) = x2− 3x+ 2.
  1. By not calculating the actual inverse of f show that f is invertible.
  2. Find the inverse of f.
Question 9 ( 4.0 marks)
Let A= R− {0} and B= A × R.
Let the binary operation * on Bbe defined as (a, b) * (c, d) = .
(i) Find the identity element of Bwith respect to the operation *.
(ii) Show that set Bis invertible with respect to the operation *.
Also, find the inverse of (−5, 3).
Question 10 ( 4.0 marks)
Let Q+denote the set of all positive rational numbers.
A relation Ron Q+× Q+is defined as .
Show that Ris an equivalence relation.
Question 11 ( 6.0 marks)
Two real valued functions fand gare defined as f(x) = e2xand g(x) = x− 3.
Show that the functions are one-to-one and onto, and thus, find their inverse.
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