Quantitative Aptitude - Arithmetic Ability Questions

Which one of the following is an irrational number?

At a telephone exchange, three phones ring at intervals of 20 sec, 24 sec and 30 seconds. If they ring together at 11 : 25 a.m, when will they next ring together?

Find the odd word/letters/number pair from the given alternatives.

In the following question, select the odd word from the given alternatives.

For the data given below. find the sum of mode. median and mean.6, 3, 8, 4, 3, 11, 7, 4, 5, 4.

The average of marks obtained by 100 candidates in a certain examination is 30. If the average marks of passed candidates is 35 and that of the failed candidates is 10, what is the number of candidates who passed the examination?

The sum of all prime numbers between 18 and 32 is:

If the loss of percent on article is 15%. Then the ratio of the cost price and sell price will be