১১৭৭১
The average of eight numbers is 14. The average of six of these numbers is 16. The average of the remaining two numbers is-
উত্তর
8
১১৭৭২
A motorist travels to a place 150 km away at an average speed of 50 km and returns at 30 km per hour. His average speed for the whole journey in km per hour is-
উত্তর
37.5
১১৭৭৫
Mira is 30 times older than her son. 18 years later she will be thrice as old as her son. What is Mira's present age?
উত্তর
40