CTET Solved Paper MCQ - CTET Feburary 2016 Paper2

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?

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.

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

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 %.

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

Organism	Type
Aspergillus	Fungi
Lactobacillus	Bacteria
Paramecium	Protozoa
Spirogyra	Algae

149

CTET Solved Paper MCQ - CTET Feburary 2016 Paper2

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