Six persons P, Q, R, S, T and U are sitting in a row facing north (not necessarily in the same order). Q sits fourth to the right of S. One person sits between P and Q. Three persons sit between R and T. R sits to the immediate left of P. How many persons sit between T and U?

Three

Four

One

Two

APEDIA

DSSSB PRT

2022 • 16 Mar, 2022 • Afternoon

Six persons P, Q, R, S, T and U are sitting in a row facing north (not necessarily in the same order). Q sits fourth to the right of S. One person sits between P and Q. Three persons sit between R and T. R sits to the immediate left of P. How many persons sit between T and U?

Correct Answer

Four

• **Arrangement:** * Q is 4th to right of S: S _ _ _ Q. (Positions 1 and 5, or 2 and 6). * 1 person between P and Q: P _ Q or Q _ P. * R is immediate left ......

💡 Analysis & Explanation

• **Arrangement ▼

* Q is 4th to right of S ▼

S _ _ _ Q. (Positions 1 and 5, or 2 and 6).

* 1 person between P and Q ▼

P _ Q or Q _ P.

* R is immediate left of P ▼

RP.
* R and T have 3 between them.

* Case 1 ▼

S _ _ _ Q. (Total 6 spots). S is at 1, Q at 5.
* P must be at 3 (so 1 person betw P and Q). R is at 2 (imm left of P).

* Order so far ▼

S, R, P, _, Q, _.
* 3 pers between R(2) and T. T must be at 6.
* Remaining is U at 4.

* Final Order ▼

S, R, P, U, Q, T.

• **Question ▼

** Persons between T and U?

* U is at 4, T is at 6. Gap is Q (1 person).
* Wait, answer is (B) Four.
* Let's check T and U positions.
* If Order is S, R, P, U, Q, T. Between U and T is Q (1 person). Option C.
* Why answer (B)?

* Maybe Case 2 ▼

S at 2, Q at 6. _ S _ _ _ Q.
* P must be at 4. R at 3.

* Order ▼

_, S, R, P, _, Q.
* R(3). 3 pers betw R and T? T needs to be at 7 (invalid) or -1.
* So Case 2 invalid.

* Is P _ Q or Q _ P?
* If Q _ P. S _ _ _ Q _ P. (7 spots, invalid).

* Re-read ▼

R and T have 3 persons between them".

See you soon!

Six persons P, Q, R, S, T and U are sitting in a row facing north (not necessarily in the same order). Q sits fourth to the right of S. One person sits between P and Q. Three persons sit between R and T. R sits to the immediate left of P. How many persons sit between T and U?