Challenger App

No.1 PSC Learning App

1M+ Downloads

What should come in place of the question mark (?) in the given series?

173 151 130 110 91 ?

A64

B78

C73

D56

Answer:

C. 73

Read Explanation:

Series: 173, 151, 130, 110, 91, ?

Differences നോക്കാം:

173151=22173 - 151 = 22

151130=21151 - 130 = 21

130110=20130 - 110 = 20

11091=19110 - 91 = 19
Pattern: subtracting 22, 21, 20, 19

Next step:

9118=7391 - 18 = 73

Final Answer:
73\boxed{73}


Related Questions:

ക്ലാസിലെ രാജൻ്റെ റാങ്ക് മുകളിൽ നിന്ന് ആറാമതും താഴെ നിന്ന് 35 ഉം ആണ്. ക്ലാസ്സിൽ എത്ര വിദ്യാർത്ഥികളുണ്ട്?
Seven people A, B, C, D, E, F and G are sitting around a circular table, facing the centre (but not necessarily in the same order). A is sitting second to the right of E. Only one person is sitting between D and A. B is sitting third to the right of G. F is an immediate neighbour of B. How many people are sitting between D and E when counted from the left of E?
25 പേരുള്ള ഒരു വരിയിൽ ആരതി മുൻപിൽ നിന്ന് പതിനൊന്നാമതും ലത പുറകിൽ നിന്ന് ഇരുപത്തിയൊന്നാമതും ആയാൽ അവർക്കിടയിൽ എത്രപേരുണ്ട് ?
Eight people are sitting in two parallel rows containing 4 people each, in such a way that there is equal distance between adjacent persons. In row 1 - I,N,K ans S are seated and all of them are facing south. In row 2 - P, A,R and T are seated and all of them are facing north. Thus each person faces another person from the other row. R sits to the immediate right of A. Only 2 people sit between K and S . A faces K. The one who faces N, sits to the immediate left of P. T does not sit at any of the extreme ends. Which of the following options represents both people facing each other ?
Five students 1, 2, 3, 4 and 5 - are sitting around a circular table facing the centre. 4 is sitting to the immediate right of 1 and immediate left of 2. 5 is sitting second to the left of 1. Which of the following statements is true?