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Worksheets10 mathematics choose the best
Total questions: 15
Worksheet time: 8mins
If n(AXB) = 6 and A={1,3} then n(B) is
1
2
3
6
If there are 1024 relations from a set A = {1,2,3,4,5} to set B, then the number of elements in B is
3
2
4
8
The range of the relation R = {x,x2} | x is a prime number less than 13} is
{2,3,5,7}
{2,3,5,7,11}
{4,9,25,49,121}
1,4,9,25,49,121}
Euclid's division lemma states that for positive integers a and b, there exist unique integers q and r such that a=b q +r, where r must satisfy .
1<r<b
0<r<b
0 ≤ r < b
0<r ≤ b
Using Euclid's division lemma, if the cube of any positive integer is divided by 9 then the possible remainders are
0,1,8
1,4,8
0,1,3
1,3,5
The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is
2025
5220
5025
2520
Given F1=1, F2=3 and Fn=Fn-1+Fn-2 then F5 is
3
5
8
11
The first term of an arithmetic progression is unity and the common difference is 4, which of the following will be a term of this A.P
4551
10091
7881
13531
If the HCF of 65 and 117 is expressible in the form of 65m-117, then the value of m is
4
2
1
3
The sum of the exponents of the prime factors in the prime factorization of 1729
1
2
3
4
A={a,b,p}, B={2,3}, C={p,q,r,s} then n[(A ∪ C) x B]
8
20
12
16
If A = {1,2} , B={2,3}, C={5,6} and D={5,6,7,8} then state which of the statement is true
(AXC) ⊂ (BXD)
(BXD) ⊂ (AXC)
(AXB) ⊂ (AXD)
(DXA) ⊂ (BXA)
If the ordered pairs (a+2,4) and (5,2a+b) are equal then (a,b) is
(2,-2)
(5,1)
(2,3)
(3,-2)
Let n(A)=m and n(B)=n then the total number of non-empty relations that can be defined from A to B is
mn
nm
2mn−1
2mn
If a letter is chosen at random from the English alphabets {a,b,.....z}, then the probability that the letter chosen precedes x
1312
131
2623
263
