Quantitative Aptitude - Arithmetic Ability Questions

Of the 3 numbers whose average is 72, the first is 2/7 times the sum of other 2. The first number is

How many natural numbers between 15 and 85 are divisible by 7?

From point P, at 6 : 30 pm, a train starts moving towards Q with the speed of 40 km/hr. Another train starts moving from point Q at 7:30 p.m. towards point P at the speed of 60 km/hr. Both of them meet at 11:30 p.m. at point R. What is the ratio of PR and QR?

∆DEF is right angled at E. If tanD = 4/3, then what is the value of tanF ?

A 600 metres long train is running at the speed of 81 km/hr. If it crosses a platform in 40 seconds, then what is the length of the platform (in metres)?

Present age of Anil and Rajesh are in the ratio of 11 : 6 respectively. 9 years ago, their ages were in the ratio of 7 : 3. If the Pankaj’s present age is 1/4 of the Anil’s present age, then what is the Pankaj’s present age (in years)?

The average temperature for Monday, Tuesday, Wednesday and Thursday was 48° . The average temperature for Tuesday, Wednesday, Thursday and Friday was 52°, If the temperature on Monday was 42°, then the temperature on Friday was (in degrees)

If the number 247_679 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be