A school recently had their Silver jubilee. As part of the celebrations, they decided to gift all its students 5 boxes of pencils. Each box contained 36 pencils, and there were 1605 students in the school. But they found that they had only 283530 pencils. How many additional pencils do they need to buy so that each student can get the specified number of gifts.
In a row of cadets, Tharaka is standing at the 14th position from the back, and Sanjeewa is standing at the 8th position from the front. If Tharaka and Sanjeewa interchange their positions, Sanjeewa becomes 18th from the front. How many cadets are there in the row?