Delhi SI CPO Nov 23 Shift-1

In a code language, if'265' is written as 'PNH','187' is written as 'OXB', and '248'is written as "NUB', then which of the
following letters represents the number‘4°?

Which two signs should be interchanged to make the given equation correct?
$$25-5\times 50\div10+35$$

Select the correct combination of mathematical signs that can sequentially replace the * signs from left to right to balance the following equation.
31*2*60*30*15*19

Select the correct mirror image of the given combination when the mirror is placed at 'PQ' as shown below.

Which number will replace the question mark (?) in the following series?
112,.? , 83,70, 58, 47, 37

Select the option in which the given figure (X) is embedded (rotation is NOT allowed).

One day, 90 students were travelling in a bus and the ratio of the number of boys to that of girls was 2 : 1. The next day,
the number of students remained the same, but the ratio of the number of boys to that of girls became 3 : 2. What was
the difference between the numbers of boys travelling in the bus on both days ?

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

select the figure that will replace the question mark (?) in the following figure series.

Select the letter-cluster that can replace the question mark (?) in the given letter-cluster series.
AE, KQ,EI, LR, 10, ? , OU, NT