A certain sum lent on simple interest amounts to Rs 1380/- in three years and to Rs 1500/- in five years. Find the rate of interest per annum.
The average age of 35 students in a class is 16 years. Out of these students, average age of 21 students is 14 years. Find the average of remaining 14 students.
Two numbers are in the ratio 3:4. If each number is increased by 6, the ratio becomes 4:5. What is the difference between the numbers?
If ‘x’ means ‘÷’, ‘-‘ means ‘x’, ‘÷’ means ‘+’ and ‘+’ means ‘-‘, then (3 – 18 ÷ 11) x 13 ÷ 8 will evaluate to :
Which of the following numbers evaluates to 15 when divided by 4 and added by 9?