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CBSE - Aptitude Mathematics
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Practice Question
Aptitude Mathematics
.
Aptitude Mathematics
If a diagonal matrix is commutative with every matrix of the same order, then it must be a:
1. null matrix
2. identity matrix
3. scalar matrix
4. triangular matrix.
Correct Answer: 3
.
Related Questions
Aptitude Mathematics
1
Hotel bill for 20 days is Rs.7150. For a week it should be
1.Rs.2384
2.Rs.2505
3.Rs.2525
4.Rs.2502.50
Correct Answer: 4
2
What will be the volume of air enclosed in a conical tent of 6 mts. height, enclosing 200 sq.m of ground?
1. 400 cu.m
2. 300 cu.m
3. 1200 cu.m
4. 400 sq.m
Correct Answer: 1
3
Sita walks 7 km in 1 1/2 hr and Bina 450 m in 5 minutes. Who walks faster than 4 1/2 km/hr?
1.Sita
2.Both of them
3.Bina
4.More data is necessary to know the answer
Correct Answer: 2
4
Students of a class are made to stand in rows. If 4 students are extra in a row, there would be 2 rows less. If 4 students are less in a row, there would be 4 more rows. Find the number of students in the class.
1. 86
2. 106
3. 96
4. Cannot be determined.
Correct Answer: 3
5
Rs.770 have been divided among A, B and C such that A receives 2/9th of what B and C together receive. Then A's share is
1. Rs.140
2. Rs.154
3. Rs.165
4. Rs.170
Correct Answer: 1