CBSE - Aptitude Mathematics

Which of the following ratios is the greatest? 3 : 4, 4 : 5, 5 : 6 1. 3 : 4 2. 4 : 5 3. 5 : 6 4. None of the above

What ratio 4/3 of Rs.6.30 bears to 0.6 of 21? 1.2 : 3 2.3 : 2 3.4 : 6 4.none of these

The arithmetic mean of 5 numbers is 27. If one of the numbers be excluded, their mean is 25. The excluded number is: 1. 28 2. 26 3. 25 4. 35

How much water must be added to 100 cc of 80% solution of boric acid to reduce it to a 50% solution? 1. 30 2. 40 3. 50 4. 60

What must be the least number of soldiers in a regiment that will allow it to be drawn up into hollow squares 10, 15 or 25 deep, and also to be formed into a solid square? 1) 6000 2) 700 3 ) 3600 4) NONE OF THESE