CBSE 11TH MATHEMATICS - Online Test
Q1. If is divisible by c , when n is odd but not when n is even , then the value of c is :
Answer : Option C
Explaination / Solution:
Since a+b will be a factor of an +bn.
Q2. A dice has 3 faces each bearing ‘ 2 ‘ and three faces each bearing ‘ 6 ‘. It is rolled once. The probability of showing up ‘a six ‘ is
Answer : Option D
Explaination / Solution:
Total no. of outcomes = 6={2,2,2,6,6,6}
p(getting a six)=3/6=1/2
Q3. The plane x + y = 0 is
Answer : Option D
Explaination / Solution:
No Explaination.
Q4. On a railway track, there are 20 stations. The number of tickets required in order that it may be possible to book a passenger from every station to every other is
Answer : Option C
Explaination / Solution:
Given that there are 20 stations in the network .
Hence from each station 19 different tickets are possible
Therefore from 20 stations the number of different tickets possible=19 X 20=380
Q5. Amp. then locus of z is
Answer : Option B
Explaination / Solution:
Q6. Find a if the coefficient of x2 and x3 in the expansion of are equal
Answer : Option C
Explaination / Solution:
Q7. The smallest set A such that A ∪{ 1,2 } = { 1,2,3,5,9 } is
Answer : Option B
Explaination / Solution:
The union of two sets A and B is the set of elements in A, or B, or both.
so smallest set A={3,5,9}
Q9. Solve the system of inequalities : ,
Answer : Option A
Explaination / Solution:
Hence the solution set is
which means
Q10. The next term of the sequence 1, 3, 6, 10, …. Is
Answer : Option A
Explaination / Solution:
In this sequence the nth term is,
so, for n = 5,
