Quantitative Aptitude - Arithmetic Ability Questions

In a class of 65 students there are 39 girls. The average weight of these girls is 60 Kg and average weight of the full class is 64 kgs. What is the average weight of the boys of the class?

What should be the missing digit so that the number 347_547 becomes exactly divisible by 11?

If A, B and C can do a job working alone in 12, 18 and 36 days respectively. They all work together for 2 day, then B quits. How many days will A and C take to finish rest of the job?

The area of a square is 72.25 cm². Find its perimeter (in cm).

What will come in the place of question mark (?) in the following question (You do not have to calculate the exact value)?

(184.002 - 29 ÷ 5) × 29.997 = ?

If the simple interest on Rs. 400 for 10 years is Rs. 280, then rate of interest per annum is

Calculate the value of 61681 x 61681 - 31681 x 3168130000?

Find the odd word/letters/number pair from the given alternatives.
(A) 52­61 (B) 43­54 (C ) 72­83 (D) 18­29