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

A10

B11

C12

D13

Answer:

C. 12

Read Explanation:

n(n-1)/2 =66 n(n-1)= 132 n^2-n-132 = 0 (n+11)(n-12) = 0 n = -11 , 12 so 12


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Comprehension:

Directions: Study the information given below and answer the question that follow:

1) Five roommates Raj, Mahesh, Suresh, Akash and Anil woke up at different time.

2) Anil woke up before Mahesh.

3) Suresh woke up after Mahesh and Akash.

4) Raj woke up before Akash and Anil.

5) Anil woke up after Akash.

Who woke up first?

മനോജിന് രാജനേക്കാൾ പ്രായമുണ്ട്. ബിജുവിന് അതുലിന്റെ അത്ര പ്രായമില്ല. രാജുവിന്റെയും അതുലിന്റെയും വയസ്സിനോട് തുല്യമാണ് രാജന്റെ വയസ്സ്. എങ്കിൽ ഏറ്റവും ഇളയത് ആരാണ്?