CBSE - Aptitude Mathematics

In a test 75% of the total candidates passed in English and 65% in Spanish, while 15% failed both in English as well as Spanish. If 495 candidates passed in both the subjects, the total number of candidates who took the test was ........ 1.600 2.800 3.1000 4.900

A boy was asked to multiply a num&shy;ber by 25. He instead multiplied the num&shy;ber by 52 and got the answer 324 more than the correct answer. The number to be multiplied was 1) 12. 2) 15 3) 25 4) 32

In a college, the ratio of the number of boys to girls is 8 : 5. If there are 160 girls, the total number of students in the college is 1. 100 2. 250 3. 260 4. 416

The mean of the following numbers 3,8,5,11,8,4,7,2,8,9 is 1. 7.5 2. 6.5 3. 8.5 4. 9.5

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.