Question Details

What should come in place of the question mark (?) in the given series? 89 87 84 79 72 ?

Options

A

57

B

59

C

63

D

61

Show Answer

Correct Answer :

Option D

61

Solution :

The correct answer is 61.

To find the missing number in the given series, let's analyze the pattern by looking at the differences between consecutive terms:

89-87=2

87-84=3

84-79=5

79-72=7

Notice that the values subtracted at each step are consecutive prime numbers: 2, 3, 5, and 7.

The prime number following 7 is 11.

Therefore, to find the term in place of the question mark (?), we subtract 11 from the last known term, 72:

72-11=61

Thus, the number that replaces the question mark is 61.

Unlock Our Free Library

Access expert-curated educational resources and study materials—completely free.

Discover more resources

You may also like

Mock Tests

View All
  • CTET
  • intermediate
  • No time limit
  • child development and pedagogy, mathematics, social science

  • SSC
  • intermediate
  • 2 hours and 30 mins
  • child development and pedagogy, mathematics, social science

Ask AI Tutor
5 left
Q1 View Question & Options
AI Tutor is solving this question...
Reading question context & options...