self Maths Puzzle

If
5+2+3+7 = 80
6+4+8+5 = 99
7+2+6+9 = 113

Then
8+2+3+4 = ?

a) 81
b) 65
c) 89
d) 192

Read Solution (Total 1)

i tnk
5*3+2*4+3*5+7*6=80
6*3+4*4+8*5+5*6=104-5=99
7*3+2*4+6*5+9*6=113
8*3+2*4+6*5+9*6=71-6=65
11 years agoHelpfull: Yes(0) No(0)

self Other Question

Two motorists A and B are practicing with two different sports car Mercedes and Maruti, on the circular racing track, for the car racing tournament to be held next month. Both A and B start from the same point on the circular track. A completes 1 round of the track in 1 min and B takes 2 min to complete a round. While A maintains speed for all the rounds, B halves his speed after the completion of each round. How many times A and B will meet between 6th round and 9th round of B (6th and 9th round is excluded)? Assume that the speed of B remains steady throughout each round and changes only after the completion of that round.

a)382
b)347
c)260
d)280 In a regular polygon, the number of diagonals is 'k' times the number of sides. If the interior angle of the polygon is, then the value of k is

a) (3i-i)/2(i-i)
b) 2(3i-i)/(i-i)
c) 2(i-i)/(3i-i)
d) (i-i)/2(3i-i)
where i = pie = 180 degree.