PROBLEMS ON LCM AND HCF  1. The four integers next lower than 81, and the four next higher than 81, are written down and added together, thi...

TIME AND DISTANCE PROBLEMS 1. A car travels a distance of 45 kms at the speed of 15 kmph. It covers the next 50 kms of its journey at the sp...

TIME AND WORK PROBLEMS  1. ‘A’ can complete a piece of work in 12 days. ‘A’ and ‘B’ together can complete the same piece of work in 8 days. ...