Online quizzes: Puzzles: Trick to solve puzzle

Online quizzes: Puzzle 1:

Math puzzles

Question: What is the value of the box with the question mark?

Answer: To solve this problem, first we need to find out a relation between rows or columns. There is a question mark in the last row. So, we will find out the relation using the first two rows. 

Row1: 10 = (12+18)/3 ;
Row2: 5 = (12+3)/3 ;

From row1 and row2 the pattern tails that, the third column entry of any row would be the one-third of the summation of the first and second column entries. So, the answer will be (8+7)/3 = 5;

One can think of the problem with respect to columns. The same technique should be followed to find out the underline pattern. Since the question mark is there in the third column, one can search for first two columns to fetch the pattern. 

Col1: 8 = (12+12)/3 ;
Col2: 7 = (18+3)/3 ;
So, the required answer will be (10+5)/3 = 5;

To get the solution in Bengali, see the below video.

অঙ্কের শর্টকাট টেকনিক শিখুন:

Online quizzes: Puzzle 2:

Question: What is the value of the box with the question mark?

Answer:

Like the previous puzzle, you need to find out the value of the box given by the question mark. So the main technique to solve this kind of problem is to find out a relationship (mathematically an operation) between the operand that satisfies all the equations except the one having unknown quantities. 

Equation 1: 7 = [{3✕(2+1)}-2] ;

Equation 2: 23 = [{5✕(4+1)}-2] ;

Equation 3: 47 = [{7✕(6+1)}-2] ;

Equation 1: 79 = [{9✕(8+1)}-2] ;

So the operation between first operand x1, second operand x2 and final number (after performing the operation) x3 is x3 =  [{x1✕(x2+1)}-2];

Hence, the required answer is [{10✕(9+1)}-2] = 98;

Answer is 98

To get the solution in Bengali, see the below video.

অঙ্কের শর্টকাট টেকনিক শিখুন: