If ‘+’ means ‘÷’, `-` means `×`, `÷` means `+` and `×` means `-`, then
36 × 12 + 4 ÷ 6 + 2 - 3 = ?

The pages of a book had been numbered 1 to 100 manually. How many times will it be essential to write the digit 5? 

Study the following information carefully and answer the questions given below:
There are six persons of different weights. Three persons are heavier than Rohan. Two person’s weight is in between Sohan and Geeta. Rajesh is heavier than Rakesh but lighter than Ram. Neither Rakesh nor Geeta is lightest person. Weight of 2nd heaviest person is 66kg. Weight of all persons are in whole numbers. What is the weight of Sohan?

Which of the following least number can be subtracted from 2486 to make it a perfect square?

If 2 is added to each even digit and 1 is subtracted from each odd digit in the number 621754, then what will be the sum of number/numbers not repeated in the new number?

If the ratio of two numbers is 13 : 15 and their L.C.M. is 39780. So are the numbers?

The ratio of the present ages of Veeru and Sunita is 14:17 respectively. After 6 years from now the ratio of their ages will be 17:20, then what is the present age of Sunita -

if 12 ( 20 ) 16 and 21 ( 35 ) 28, then what is value of A in 48 ( 80 ) A ?