Quantitative Aptitude - Arithmetic Ability Questions

In the given figure, E and F are the centers of two identical circles. What is the ratio of area of triangle AOB to the area of triangle DOC?

If a number is decreased by 10%, it becomes 54. To make it 72, it should be increased by

The average marks of 18 students in an examination was 60. It was later found that the marks of one student had been wrongly entered as 63 instead of 36. The correct average is:

LCM of two co-prime numbers a and b is (a is greater than b):

If (1 + secA)/tanA = x, then x is

5% discount is offered on an item. By applying a promo code the customer wins 20% cash back. What is the effective discount?

If 3A = 2B = C, then A : B : C = ?

Faiyaz's birthday is on Wednesday 12th April. On what day of the week will be Shray's Birthday in the same year if Shray was born on 2nd October?