Puzzle hard

Level pending

A special calculation is done here......! 2+3=8, 3+7=27, 4+5=32, 5+8=60, 6+7=72, 7+8=??


The answer is 98.

Siva Prasad by Siva Prasad , 20, India

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3 solutions

Rocky El-Azar
Apr 25, 2014

Add the first two numbers in each equation, subtract 1 from the sum, then multiply the result by the first number in each equation.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

Find a pattern: since it's a "special" calculation it can be outrageous! xD 2+3=8 was answered by 3+1=4x2=8 3+7 was answered by 7+2=9x3=27 So the second addend in the first,second,third..sixth equation increases by 1,2,3,4,5,6 and the sum is multiplied to the first addend of their respective equation so 7+8 can be answered by 8+6=14x7=98

2 Helpful 0 Interesting 0 Brilliant 0 Confused
Amruta Vasudevan
Jun 25, 2014

The next number is each term here follows a pattern: 1) 2+3=8 --> 2+3=5; (5x1)+3=8 2)3+7=27--> 3+7=10; (10x2)+7=27 3)4+5=32--> 4+5=9; (9x3)+5=32 Thus by mathematical induction, the 6th term 7+8--> (15x6) +8=98

1 Helpful 0 Interesting 0 Brilliant 0 Confused

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