self Maths Puzzle

if a,b and c are non-zero numbers such that |a-b|=|c| and |a-c|=|b|, then what is the value of b^2+c^2 ?

a)a^2-2bc
b)2bc
c)a^2
d)a^2+2bc

Read Solution (Total 1)

self Other Question

The number of members in A's family is (20 + k)% more than that in B's family, where k is a real number. The number of members in C's family is 25% less than that in A's family. What is the minimum number of members in the three families taken together?

a)10
b)9
c)15
d)8
What is the last digit of 1! - 2! + 3! - 4! + 5! - 6!+ .......+99!?

a) 9
b) 1
c) 0
d) None of these