There are 26 English Alphabets. They are:
A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z.
Therefore, from the left end the 13th letter is M and is Consonent. And from the right end the 13th letter is N and is Consonent.
According to the question, after the position of the first and third digit interchanged new numbers are
789, 415, 856, 784, 404, 962
962, 856, 789, 784, 404, 415
Here the second lowest number is 404 and the last digit of it is '4'.
Number of boys in the row = number of boys uptil P + number of boys between P and Q + number of boys including Q and those behind Q = 14 + 4 + 7 = 25.
Total number of students in the class = 28 + 6 i.e, from top(7-1)
28 + 6 = 34
The 4th day is tuesday, then 11, 18, 25th also tuesdays
Then 3 days after 24th is 27th, which is thursday
Number of boys in the row = (6 + 10 + 8) = 24
The possibe two-digit numbers are: 88, 85, 82, 81, 87, 86, 58, 28, 18, 78, 68
These are 11 in number
There are 10 digits. Now, third digit from the right means (10-3+1 = ) 8th digit from the left. But, from the question , third and eighth digits are interchanged. Hence, the required digit is the third digit of the given number, ie 0.
Only one such symbol is there in the given arrangement.
It is 4@5.
M is 8th from the top.
H is (50 - 20 + 1 =) 31 st from the top.
Number of students between M and H = (31 - 8- 1=)22
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