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Choose the correct number to replace the incorrect from the alternatives given to keep the series in order 3, 7, 13, 21, 33, 43, 57, 73.

A22

B52

C31

Dnone of these

Answer:

C. 31

Read Explanation:

From left to right, the difference between adjascent terms increases by 2. But in the case of 4th & 4th terms, the difference is increased by 4. So the correct term will be 31.


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ഒരു മീറ്റിങ്ങിലെ ആളുകൾ പരസ്പരം ഹസ്തദാനം ചെയ്തപ്പോൾ 66 ഹസ്തദാനങ്ങൾ നടന്നു എന്നാൽ മീറ്റിങ്ങിൽ പങ്കെടുത്ത ആളുകളുടെ എണ്ണം എത്ര ?