CTET Solved Paper - CTET Feburary 2016 Paper2

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146. If x, y and z represent the number of faces, number of vertices and number of edges respectively of a polyhedra, then which of the following is true?

  • Option : D
  • Explanation : We know that for any polynedra
    F + V - E = 2; where F = number of faces
    V = number of verticcs,
    E = number of Edges.
    ∴ x + y - z = 2
    ⇒ x - z = 2 - y.
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147. Ravi purchased two articles for ₹1500 each. Resold them, gaining 6% on one and losing 4% on the other. His gain/loss percent in the whole transaction is

  • Option : A
  • Explanation : Given, Ravi purchase two articles for ₹1500 each.
    Total CP = ₹3000.
    Ravi gets 6% profit on first article, then SP of 1st article
    = 1500 + 1500 x 6/100.
    = ₹1590.
    After selling 2nd article, he loses 4%. Then, SP of 2nd article
    = 1500 - 1500 x 4/100.
    = ₹1440.
    ∴ Total amount after selling of both article
    = 1590 + 1440 = ₹3030.
    ∴ profit % = 30/3000 x 100% = =1 %.
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148. Consider the following Column A and Column B in which the names of micro-organisms are given in Column A and the groups to which they belong are given in Column B.

Column A Column B
A. Aspergillus I. Algae
B. Lactobacillus II. Bacteria
C. Paramecium III. Fungi
D. Spirogyra IV. Protozoa

The correct match of the items of Column A with that of Column B is
Codes
ABCD

  • Option : A
  • Explanation :
    Organism Type
    Aspergillus Fungi
    Lactobacillus Bacteria
    Paramecium Protozoa
    Spirogyra Algae
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149. ctetfeb16 q51

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