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1

IIT-JEE 1982

MCQ (Single Correct Answer)
Two towns A and B are 60 km apart. A school is to be built to serve 150 students in town A and 50 students in town B. If the total distance to be travelled by all 200 students is to be as small as possible, then the school should be built at
A
town B
B
45 km from town A
C
town A
D
45 km from town B
2

IIT-JEE 1982

MCQ (Single Correct Answer)
The number of real solutions of the equation $${\left| x \right|^2} - 3\left| x \right| + 2 = 0$$ is
A
4
B
1
C
3
D
2
3

IIT-JEE 1980

MCQ (Single Correct Answer)
If $$\,({x^2} + px + 1)\,$$ is a factor of $$(a{x^3} + bx + c)$$, then
A
$${a^2} + {c^2} = - ab\,$$
B
$${a^2} - {c^2} = - ab$$
C
$${a^2} - {c^2} = ab$$
D
none of these
4

IIT-JEE 1980

MCQ (Single Correct Answer)
The least value of the expression $$2\,\,{\log _{10}}\,x\, - \,{\log _x}(0.01)$$ for x > 1, is
A
10
B
2
C
- 0.01
D
none of these.

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