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Directions : Read the following questions carefully and choose the right answer.
1
The positions of how many digits in the number 2451479638 will remain same when the first half and the second half of the digits are arranged in ascending order separately?
» Explain it
C
The given number:

2  4  5  1  4  7  9  6  3  8

After arranging the first half and the second half of the digits of given number in ascending order, we get new number as:

1  2  4  4  5  3  6  7  8  9

Now,
 
2 4 5 1 4 7 9 6 3 8
1 2 4 4 5 3 6 7 8 9

 Comparing both the numbers, we can say that there is no number whose position remains unchanged.

Hence, the correct answer is option C.

2
In a row where all are facing north, Priya is 15th from the left end and Garima is 19th from the right end. They interchange their positions, and Ram who sits 24th from the left end sits at the 5th place to the left of Priya's new position. How many persons were there in the row?
» Explain it
C
Using the given information we can create a following figure:


Here the total number of persons in the queue = (*29 + 19 - 1)

= 47

Note: 29 is derived by adding Ram's position from left end of the row (24) and his position with respect to Priya (5).

Hence, the correct answer is option C.
3
During a prize distribution ceremony, Vikram was ninth from the left while Janhvi was eighth from the right in the front row. If Hariom was thirteenth from the left and was exactly in the middle of Vikram and Janhvi in the same row then what was the total number of people in the front row?
» Explain it
D
Here, we know that Vikram was ninth from the left while Hariom was thirteenth from the left. So, we can say that there were 3 persons between Vikram and Hariom.

And, we also know that Hariom was exactly in the middle of Vikram and Janhvi so the number of persons between Hariom and Janhvi will also be 3.

At this point, using the given information we can create a following figure:



Now, total number of people in the queue = (8 + Vikram + 3 + Hariom + 3 + Janhvi + 7)

= (8 + 1 + 3 + 1 + 3 + 1 + 7) = 24

Thus, the total number of people in the queue was 24.

Hence, the correct answer is option D.
 
4
In a north facing row of NCC Cadets, Trisha is 9th from the left end and Tina is 12th from the right end. There are 5 cadets between Trisha and Tanya who is equidstant to Tina. Find how many cadets are there in the row?
» Explain it
B


Adding all the persons in the above image, we get:

8 + 1(Trisha) + 5 + 1(Tanya) + 5 + 1(Tina) + 11 = 32

Thus there are 32 cadets in the row.

Hence option B is the correct answer.

5
In a queue of students facing north, Ayesha and Anisha are standing at 10th and 8th position from the left and right end respectively. If another student Ariva who is 12th from the left end is exactly in between Ayesha and Anisha then find the position of Ayesha from right end ?
» Explain it
B
From the given image it is clear that Ayesha is 12th from the right end.



Position of Ayesha from right end = 7 + 1(Anisha) + 1 + 1(Ariva) +1 + 1 = 12

Hence option B is the correct answer.