Number, Ranking and Time Sequence Test Questions and Answers

Answer: A

Correct answer: 2

Two 7s qualify: the one in 3 7 3, which is preceded by 3 and followed by 3, and the one in 2 7 3. The 7s in 5 7 2 and 5 7 3 are ruled out by the 5 before them, and the last 7 is followed by 8. So there are 2.

Answer: D

Given that Vishal is 24th from either end of the row i.e from two sides

  1 2 3 4 5 . . . . . .24 23 22 21 20 . . . . . 5 4 3 2 1 

  Here before Vishal there are 23 members and after Vishal there are 23 members

  = 23+1+23 --> 47 members in the row.

Answer: B

Correct answer: 19

The second, fourth and sixth digits of 93217648 are 3, 1 and 6. Arranged as 361 they give \( 19^2 \), and 19 is a two-digit odd number - so the number whose square can be formed is 19.

Answer: D

Correct answer: None of these

Interchanging the digits in pairs turns 94316875 into 49138657. The seventh digit from the left is then 5, and the third place to its left is the fourth digit, 3 - which is not among the choices offered, so the answer is none of these.

Answer: D

The given numbers are :

382  473  568  728  847  629

When changes are made as given in the question, numbers become as follows :

238  347  856  872  784  962

Again now, find out the difference between the numbers given in options as given below:

(1) 473 - 382  => 347 - 238 = 109

(2) 629 - 728  => 962 - 872 = 90

(3) 629 - 847  => 962 - 784 = 178

(4) 728 - 847  => 872 - 784 = 88

Answer: D

Correct answer: Five

Five 5s have a 3 or a 4 immediately before them and something other than 8 or 9 after them - the 5s at the sixth, twelfth, sixteenth, twenty-first and twenty-fourth places. The rest are ruled out either by what precedes them or by an 8 or 9 following. So the answer is five.

Answer: B

Correct answer: 13

Atul is 4th from the left and 12th from the right, so the line already holds \( 4 + 12 - 1 = 15 \) boys. To bring it to 28, \[ 28 - 15 = \mathbf{13} \] more must be added.

Answer: C

Correct answer: 18th

Mukul is 25th from behind in a queue of 50, so he is \( 50-25+1 = 26 \)th from the front. Mamta stands midway between the 10th and the 26th place: \[ \frac{10+26}{2} = \mathbf{18} \text{th} \]

Answer: C

Correct answer: 40

Raftaar stands 23 places to the left of Panjab, who is 19th from the right, so Raftaar is 42nd from the right. Being at the exact centre he has equal numbers on each side, so the row holds \( 2\times42-1 = 83 \) buses and Raftaar is also 42nd from the left. Between him and the bus at the left end there are then \[ 42 - 2 = \mathbf{40} \] buses.

Answer: B

Correct answer: 4

The sequence has 27 numbers, so the middle one is the 14th, which is 9. Counting three places to its left brings us to the 11th number, 4.