Challenger App

No.1 PSC Learning App

1M+ Downloads
In the following number series, one number is wrong. Find the wrong number Number series : 1, 2, 6, 15, 31, 56, 91

A31

B91

C15

D56

Answer:

B. 91


Related Questions:

Eight lawyers with the initials A, K, L, M, N, O, P and Q were sitting around a square table and were facing the centre. Four of them were sitting at the corners, while the other four were at the exact centre of the sides. L, at a corner, was to the immediate right of M and was diagonally opposite to A. Q, sitting at a corner, was next to both M and K. P was second to the left of A. N was not sitting diagonally opposite to M. Which lawyer was second to the left of K?
Seven people, A, B, C, D, E, F and G, are sitting in a row, facing north. Only four people sit to the right of B. Only four people sit to the left of E. F sits to the right of D but left of B. C sits third to the left of G. How many people sit to the left of A?
Seven surgeons, W, X, Y, Z, A, B and C, were sitting around a square table, facing the centre. Four of them are sitting at the corners while three are sitting at the exact centre of the sides. One of the centre of sides was empty. C, at one of the corners, was immediately next to both B and Y. Z was immediately next to both B and X. A was at the immediate right of X. Which surgeon was third to the right of W?

Read the following information carefully and answer the question given below.

Arjun, Banu, Keerthi, Deepan, Harini, Vasanth, Gayathri and Kumar are sitting around a circle facing the center. Banu is third to the right of Vasanth and third to the left of Kumar. Keerthi is fourth to the left of Arjun. Arjun is not an immediate neighbour of Vasanth and Banu. Harini is not an immediate neighbour of Banu. Gayathri is second to the right of Deepan.

Who among the following is third to the left of Harini?

Five girls are sitting in a row. Roshni is not adjacent to Sulekha or Abhinaya. Radha is not adjacent to Mini. Mini is at the middle in the row. Then Radha is adjacent to whom out of the following?