Quantitative Aptitude - Arithmetic Ability Questions

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?

ΔPQR is right angled at Q. QS is the altitude. PQ is 2√13 cm and PS is 8 cm. What is the length of SR?

Find the greatest length which can be used to measure exactly three cloth pieces of lengths 1.26 m, 1.98 m and 1.62 m respectively.

614% of 1600 + 1212% of 800 is equal to

If a2+b2+c2=14 and a+b+c=6, then the value of ab+bc+ca is,

Shaan got a total of Rs. 912 in the denomination of equal numbers of Rs. 1, Rs. 5 and Rs. 10 coins. How many coins do Shaan posses?

If (x/5) + (5/x) = – 2, then what is the value of x3?

The average (arithmetic mean) amount of savings of ten students is Rs. 600. Three of the students have no savings at all and each of the others have at least Rs. 250 including Nihar, who has exactly Rs. 1300. The largest amount, in Rs., that any one student could have is